Chapter 3

Physics

+2 college entrance (after SEE) past exam questions

Past questions and answers

26 questions set from this chapter, 16 of them more than once; 1 is most repeated (set, or a close variant set, in 3 or more exams). Most repeated first.

Most repeated · 3 of 11 exams
Asked 3 times
2080 · Science Model · 1 mark
2081 · Science Model · 1 mark
2079 · Science Model · 1 mark

Upthrust of a liquid on a body depends upon …….. (a) Density of body (b) Volume of the liquid (c) Acceleration due to gravity (d) All of the above

Answer

(c) Acceleration due to gravity

Upthrust $= V\rho_{liquid}\,g$ , where $V$ is the volume of liquid displaced. It depends on the liquid density, displaced volume and $g$ , not on the density of the body or the total volume of the liquid.

Answer checked by Claude Sonnet · Oct 21, 2026

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2077 · Science Model · 1 mark
2079 · Science Model · 1 mark

The velocity of a body is given by the equation $v = a + bx$ , where $x$ is displacement. The unit of $b$ is ……. (a) $\mathrm{s^{-1}}$ (b) $\mathrm{s}$ (c) $\mathrm{ms^{-1}}$ (d) $\mathrm{ms^{-2}}$

Answer

(a) $\mathrm{s^{-1}}$

Terms in $v = a + bx$ must have the same dimensions, so $[bx]=[v]=\mathrm{m\,s^{-1}}$ . Hence $[b]=\dfrac{\mathrm{m\,s^{-1}}}{\mathrm{m}}=\mathrm{s^{-1}}$ .

Answer checked by Claude Sonnet · Oct 21, 2026

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2077 · Science Model · 1 mark
2079 · Science Model · 1 mark

The unit of power is ………. (a) $\mathrm{kg\,m^{2}s^{-2}}$ (b) $\mathrm{kg\,m^{2}s^{-1}}$ (c) $\mathrm{kg\,m\,s^{-2}}$ (d) $\mathrm{kg\,m^{2}s^{-3}}$

Answer

(d) $\mathrm{kg\,m^{2}s^{-3}}$

Power is work per unit time, so $P=\dfrac{F\,s}{t}=\dfrac{\mathrm{kg\,m\,s^{-2}\cdot m}}{\mathrm{s}}=\mathrm{kg\,m^2s^{-3}}$ (i.e. watt).

Answer checked by Claude Sonnet · Oct 21, 2026

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2077 · Science Model · 1 mark
2079 · Science Model · 1 mark

Which of the following is a vector quantity? (a) Electric field intensity (b) Electric current (c) Pressure (d) Gravitational potential

Answer

(a) Electric field intensity

It has both magnitude and direction ( $\vec E=\vec F/q$ ). Current, pressure and gravitational potential are scalars.

Answer checked by Claude Sonnet · Oct 21, 2026

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2077 · Science Model · 1 mark
2079 · Science Model · 1 mark

Which one of the following four statements is false? (a) A body can have zero velocity and still be accelerated (b) A body can have constant velocity and still have varying speed. (c) The direction of the velocity of a body can change when its acceleration is constant (d) A body can have constant speed and still have varying velocity

Answer

(b) A body can have constant velocity and still have varying speed.

This statement is false. Constant velocity means constant magnitude and direction, so the speed (the magnitude of velocity) must also be constant. The others are true: at the top of a vertical throw $v=0$ but $a=g$ ; projectile motion changes direction under constant acceleration; uniform circular motion has constant speed but varying velocity.

Answer checked by Claude Sonnet · Oct 21, 2026

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2077 · Science Model · 1 mark
2079 · Science Model · 1 mark

The image of an object formed by a device is always virtual and small. The device may be …… (a) Convex mirror (b) Concave mirror (c) Convex lens (d) A glass plate

Answer

(a) Convex mirror

A convex mirror always forms a virtual, erect and diminished image for any object position in front of it. A concave mirror and convex lens can form real or magnified images, and a glass plate forms an image of the same size.

Answer checked by Claude Sonnet · Oct 21, 2026

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2077 · Science Model · 1 mark
2079 · Science Model · 1 mark

The refractive index of a medium is greater for …….. (a) Red light (b) Green light (c) Yellow light (d) Violet light

Answer

(d) Violet light

By Cauchy's relation $\mu = A + B/\lambda^2$ , the shorter the wavelength the greater the refractive index. Violet has the shortest wavelength of the options, so $\mu_{violet}>\mu_{red}$ .

Answer checked by Claude Sonnet · Oct 21, 2026

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2080 · Science Model · 1 mark
2081 · Science Model · 1 mark

A body thrown upward has a velocity of 5 m/s at a height of 10 m. The maximum height attained by the body is ………. ( $g = 10\ \text{m/s}^2$ ) (a) 22.5 m (b) 11.25 m (c) 15.25 m (d) 20.25 m

Answer

(b) 11.25 m

At 10 m the speed is 5 m/s. The further rise is $h = \frac{v^2}{2g} = \frac{25}{20} = 1.25\ \text{m}$ So the maximum height is $10 + 1.25 = 11.25$ m.

Answer checked by Claude Sonnet · Oct 21, 2026

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2080 · Science Model · 1 mark
2081 · Science Model · 1 mark

A man of mass $m$ can lift a load double his weight on the surface of the earth. The quantity of load he can lift on the surface of the moon is ……. (a) $mg$ (b) $mg/3$ (c) $2mg$ (d) $12mg$

Answer

(d) $12mg$

On earth he can lift a load of weight $2mg$ (mass $2m$ ), so the force he can exert is $2mg$ . On the moon $g_m = g/6$ , so the same force lifts a mass $M = \frac{2mg}{g/6} = 12m$ whose weight on earth would be $12mg$ , matching the option.

Answer checked by Claude Sonnet · Oct 21, 2026

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2080 · Science Model · 1 mark
2081 · Science Model · 1 mark

A car is moving with a uniform speed of 25 m/s by applying a force of 25 N. The power developed in the car is ……. (a) 625 watt (b) 600 watt (c) 675 watt (d) 650 watt

Answer

(a) 625 watt

$P = Fv = 25 \times 25 = 625\ \text{W}$

Answer checked by Claude Sonnet · Oct 21, 2026

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2080 · Science Model · 1 mark
2081 · Science Model · 1 mark

A simple machine has 50% efficiency. The velocity ratio (V.R.) of the machine is equal to …… (a) Mechanical advantage (b) 2 × Mechanical advantage (c) $\frac{1}{2}$ × Mechanical advantage (d) 4 × Mechanical advantage

Answer

(b) 2 × Mechanical advantage

$\eta = \frac{M.A.}{V.R.} \Rightarrow 0.5 = \frac{M.A.}{V.R.} \Rightarrow V.R. = 2 \times M.A.$

Answer checked by Claude Sonnet · Oct 21, 2026

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2080 · Science Model · 1 mark
2081 · Science Model · 1 mark

The velocity of sound in air is independent of ……… (a) Temperature (b) Density (c) Humidity (d) Pressure

Answer

(d) Pressure

$v = \sqrt{\gamma P/\rho}$ ; at constant temperature a change in pressure changes density in proportion, so $P/\rho$ and hence the speed is unchanged. Temperature, density and humidity do affect it.

Answer checked by Claude Sonnet · Oct 21, 2026

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2080 · Science Model · 1 mark
2081 · Science Model · 1 mark

If the critical angle of a material is $30^\circ$ , then the refractive index of the same material is …… (a) 1.5 (b) 2 (c) 1.33 (d) 1

Answer

(b) 2

$n = \frac{1}{\sin C} = \frac{1}{\sin 30^\circ} = \frac{1}{0.5} = 2$

Answer checked by Claude Sonnet · Oct 21, 2026

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2080 · Science Model · 1 mark
2081 · Science Model · 1 mark

Two resistors each of resistance $2\ \Omega$ are connected in series and then in parallel. The ratio of the resultant resistance in series to the resultant resistance in parallel is …… (a) 2 : 1 (b) 1 : 2 (c) 4 : 1 (d) 1 : 4

Answer

(c) 4 : 1

Series: $R_s = 2 + 2 = 4\ \Omega$ . Parallel: $R_p = \dfrac{2\times 2}{2+2} = 1\ \Omega$ . Ratio $R_s : R_p = 4 : 1$ .

Answer checked by Claude Sonnet · Oct 21, 2026

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2080 · Science Model · 1 mark
2081 · Science Model · 1 mark

The temperature of a patient is $40^\circ$ C. This temperature on the Fahrenheit scale will be …… (a) $104^\circ$ F (b) $72^\circ$ F (c) $96^\circ$ F (d) $100^\circ$ F

Answer

(a) $104^\circ$ F

$F = \frac{9}{5}C + 32 = \frac{9}{5}(40) + 32 = 72 + 32 = 104^\circ\text{F}$

Answer checked by Claude Sonnet · Oct 21, 2026

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2080 · Science Model · 1 mark
2081 · Science Model · 1 mark

At what height from the earth's surface does the value of $g$ become one-fourth of its value at the earth's surface? ( $R$ is the radius of the earth) (a) $R$ (b) $\frac{R}{2}$ (c) $\frac{R}{4}$ (d) $\frac{3R}{4}$

Answer

(a) $R$

$g_h = \frac{gR^2}{(R+h)^2} = \frac{g}{4} \Rightarrow R + h = 2R \Rightarrow h = R$

Answer checked by Claude Sonnet · Oct 21, 2026

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2077 · Science Model · 1 mark

A car moves with the speed of 40 km/hr for the first half distance and 60 km/hr for the second half distance. The average speed of the car is ……….. (a) 45 km/hr (b) 48 km/hr (c) 50 km/hr (d) 54 km/hr

Similar questions: A car moves with the speed of 40 Km/hr for the (2079 · Science Model)

Answer

(b) 48 km/hr

Let the total distance be $2d$ . Time taken is $\dfrac{d}{40}+\dfrac{d}{60}=\dfrac{5d}{120}=\dfrac{d}{24}$ .

$v_{avg}=\frac{2d}{d/24}=48\ \mathrm{km/hr}$

This is the harmonic mean $\dfrac{2(40)(60)}{40+60}=48$ .

Answer checked by Claude Sonnet · Oct 21, 2026

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2077 · Science Model · 1 mark

The scale of temperature having no negative temperature is …… (a) Kelvin scale (b) Celsius scale (c) Fahrenheit scale (d) Reaumur scale

Similar questions: The scale of temperature having no negative (2079 · Science Model)

Answer

(a) Kelvin scale

The Kelvin scale starts at absolute zero (0 K), the lowest possible temperature, so it has no negative values. The Celsius, Fahrenheit and Reaumur scales can read below zero.

Answer checked by Claude Sonnet · Oct 21, 2026

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2079 · Science Model · 1 mark

A car moves with the speed of 40 Km/hr for the first half distance and 60 Km/hr for second half distance. The average speed of car is ……….. (a) 45 Km/hr (b) 48Km/hr (c) 50 Km/hr (d) 54 Km/hr

Similar questions: A car moves with the speed of 40 km/hr for the (2077 · Science Model)

Answer

(b) 48 Km/hr

For equal distances $d$ covered at speeds $v_1$ and $v_2$ , the average speed is total distance over total time:

$v_{avg}=\frac{2d}{\frac{d}{40}+\frac{d}{60}}=\frac{2\times 40\times 60}{40+60}=\frac{4800}{100}=48\ \text{km/hr}$

Answer checked by Claude Sonnet · Oct 21, 2026

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2079 · Science Model · 1 mark

The scale of temperature having no negative temperature is …… (a) Kelvin scale (b) Celsius scale (c) Fahrenheit scale (d) Reaumer scale

Similar questions: The scale of temperature having no negative (2077 · Science Model)

Answer

(a) Kelvin scale

The Kelvin scale starts at absolute zero (0 K = $-273.15\,^\circ$ C), the lowest possible temperature, so it has no negative values.

Answer checked by Claude Sonnet · Oct 21, 2026

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2077 · Science Model · 1 mark

A difference of temperature of $25^\circ$ C is equivalent to a difference of ……… (a) $32^\circ$ F (b) $25^\circ$ F (c) 25 K (d) $72^\circ$ F

Answer

(c) 25 K

The Celsius and Kelvin degrees are the same size ( $T_K=T_C+273$ ), so a difference of $25^\circ$ C equals a difference of 25 K. (In Fahrenheit it would be $25\times\tfrac95=45^\circ$ F.)

Answer checked by Claude Sonnet · Oct 21, 2026

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2079 · Law Model · 1 mark

Which of the following is not a source of light? (a) Sun (b) Moon (c) Star (d) none

Answer

(b) Moon

The Sun and stars produce their own light (luminous bodies). The Moon has no light of its own; it only reflects sunlight.

Answer checked by Claude Sonnet · Oct 21, 2026

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2079 · Science Model · 1 mark

A difference of temperature of 25°C is equivalent to a difference of ……… (a) 32°F (b) 25°F (c) 25K (d) 72°F

Answer

(c) 25 K

A temperature interval has the same size in kelvin as in degrees Celsius, so 25°C difference = 25 K. In Fahrenheit it would be $25\times\frac{9}{5}=45^\circ$ F, which is not among the options.

Answer checked by Claude Sonnet · Oct 21, 2026

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2080 · Law Model · 1 mark

Which of the following is not a source of heat? (a) Sun (b) Candle (c) Blanket (d) none

Answer

(c) Blanket

A blanket only insulates the body and reduces heat loss; it does not produce heat. The Sun and a candle are sources of heat.

Answer checked by Claude Sonnet · Oct 21, 2026

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2080 · Law Model · 1 mark

Which of the following is not a unit of time? (a) second (b) light year (c) tropical year (d) minute

Answer

(b) light year

A light year is a unit of distance (about $9.46 \times 10^{15}$ m), not time. Second, minute and tropical year are units of time.

Answer checked by Claude Sonnet · Oct 21, 2026

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2080 · Law Model · 1 mark

What is the gravity of earth (in $\text{m/s}^2$ )? (a) 9.8 (b) 8.9 (c) 7.8 (d) 8.6

Answer

(a) 9.8

The acceleration due to gravity on Earth is approximately $9.8\ \text{m/s}^2$ .

Answer checked by Claude Sonnet · Oct 21, 2026

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Questions from CCRC Entrance Model Question 2077 (Science) (College model paper for the +2 Science entrance, 100 MCQs, 2077 BS; page images posted on a student blog), CCRC Entrance Examination Model Questions 2080 (Science) (College model paper for the +2 Science entrance, 100 MCQs; linked from the CCRC model questions page (ccrc.edu.np/modelquestions/) and posted as 2080 images on a student blog), CCRC Entrance Examination Model Questions 2080 (Management) (College model paper for the +2 Management entrance, 100 MCQs, 2080 BS), CCRC Entrance Examination Model Questions (Management), current model on the admission page (Management model paper linked from ccrc.edu.np/modelquestions/ for the 2083/84 admission; same questions as the 2080 paper), CCRC Entrance Model Question 2079 (Management/Humanities) (College model paper for the +2 Management/Humanities entrance, 2079 BS), CCRC Model Question for Grade XI Admission (+2 Law) (College model paper for the +2 Law entrance (language test and 50 MCQs), posted 2022 (2079 BS)), CCRC Entrance Examination Model Questions 2081 (Science) (College model paper for the +2 Science entrance, 100 MCQs, posted June 2024 (2081 BS)), CCRC Entrance Examination Model Questions 2081 (Management) (College model paper for the +2 Management entrance, 100 MCQs, posted June 2024 (2081 BS)), CCRC Entrance Model Question 2079 (Science) (College model paper for the +2 Science entrance, 100 MCQs, 2079 BS), CCRC Entrance Model Question 2077 (Management) (College model paper for the +2 Management entrance, 75 MCQs, 2077 BS) and CCRC Entrance Examination Model Questions 2080 (Law) (College model paper for the +2 Law entrance (language test and 50 MCQs), 2080 BS). Answers are written for this site; check them against your class notes.

Past questions and answers

1.Upthrust of a liquid on a body depends upon …….. (a) Density of body (b) Volume of the liquid (c) Acceleration due to gravity (d) All of the above

2.The velocity of a body is given by the equation v=a+bxv = a + bxv=a+bx, where xxx is displacement. The unit of bbb is ……. (a) s−1\mathrm{s^{-1}}s−1 (b) s\mathrm{s}s (c) ms−1\mathrm{ms^{-1}}ms−1 (d) ms−2\mathrm{ms^{-2}}ms−2

3.The unit of power is ………. (a) kg m2s−2\mathrm{kg\,m^{2}s^{-2}}kgm2s−2 (b) kg m2s−1\mathrm{kg\,m^{2}s^{-1}}kgm2s−1 (c) kg m s−2\mathrm{kg\,m\,s^{-2}}kgms−2 (d) kg m2s−3\mathrm{kg\,m^{2}s^{-3}}kgm2s−3

4.Which of the following is a vector quantity? (a) Electric field intensity (b) Electric current (c) Pressure (d) Gravitational potential

6.The image of an object formed by a device is always virtual and small. The device may be …… (a) Convex mirror (b) Concave mirror (c) Convex lens (d) A glass plate

7.The refractive index of a medium is greater for …….. (a) Red light (b) Green light (c) Yellow light (d) Violet light

8.A body thrown upward has a velocity of 5 m/s at a height of 10 m. The maximum height attained by the body is ………. (g=10 m/s2g = 10\ \text{m/s}^2g=10 m/s2) (a) 22.5 m (b) 11.25 m (c) 15.25 m (d) 20.25 m

9.A man of mass mmm can lift a load double his weight on the surface of the earth. The quantity of load he can lift on the surface of the moon is ……. (a) mgmgmg (b) mg/3mg/3mg/3 (c) 2mg2mg2mg (d) 12mg12mg12mg

10.A car is moving with a uniform speed of 25 m/s by applying a force of 25 N. The power developed in the car is ……. (a) 625 watt (b) 600 watt (c) 675 watt (d) 650 watt

11.A simple machine has 50% efficiency. The velocity ratio (V.R.) of the machine is equal to …… (a) Mechanical advantage (b) 2 × Mechanical advantage (c) 12\frac{1}{2}21​ × Mechanical advantage (d) 4 × Mechanical advantage

12.The velocity of sound in air is independent of ……… (a) Temperature (b) Density (c) Humidity (d) Pressure

13.If the critical angle of a material is 30∘30^\circ30∘, then the refractive index of the same material is …… (a) 1.5 (b) 2 (c) 1.33 (d) 1

14.Two resistors each of resistance 2 Ω2\ \Omega2 Ω are connected in series and then in parallel. The ratio of the resultant resistance in series to the resultant resistance in parallel is …… (a) 2 : 1 (b) 1 : 2 (c) 4 : 1 (d) 1 : 4

15.The temperature of a patient is 40∘40^\circ40∘C. This temperature on the Fahrenheit scale will be …… (a) 104∘104^\circ104∘F (b) 72∘72^\circ72∘F (c) 96∘96^\circ96∘F (d) 100∘100^\circ100∘F

16.At what height from the earth's surface does the value of ggg become one-fourth of its value at the earth's surface? (RRR is the radius of the earth) (a) RRR (b) R2\frac{R}{2}2R​ (c) R4\frac{R}{4}4R​ (d) 3R4\frac{3R}{4}43R​

17.A car moves with the speed of 40 km/hr for the first half distance and 60 km/hr for the second half distance. The average speed of the car is ……….. (a) 45 km/hr (b) 48 km/hr (c) 50 km/hr (d) 54 km/hr

18.The scale of temperature having no negative temperature is …… (a) Kelvin scale (b) Celsius scale (c) Fahrenheit scale (d) Reaumur scale

19.A car moves with the speed of 40 Km/hr for the first half distance and 60 Km/hr for second half distance. The average speed of car is ……….. (a) 45 Km/hr (b) 48Km/hr (c) 50 Km/hr (d) 54 Km/hr

20.The scale of temperature having no negative temperature is …… (a) Kelvin scale (b) Celsius scale (c) Fahrenheit scale (d) Reaumer scale

21.A difference of temperature of 25∘25^\circ25∘C is equivalent to a difference of ……… (a) 32∘32^\circ32∘F (b) 25∘25^\circ25∘F (c) 25 K (d) 72∘72^\circ72∘F

22.Which of the following is not a source of light? (a) Sun (b) Moon (c) Star (d) none

23.A difference of temperature of 25°C is equivalent to a difference of ……… (a) 32°F (b) 25°F (c) 25K (d) 72°F

24.Which of the following is not a source of heat? (a) Sun (b) Candle (c) Blanket (d) none

25.Which of the following is not a unit of time? (a) second (b) light year (c) tropical year (d) minute

26.What is the gravity of earth (in m/s2\text{m/s}^2m/s2)? (a) 9.8 (b) 8.9 (c) 7.8 (d) 8.6

Upthrust of a liquid on a body depends upon …….. (a) Density of body (b) Volume of the liquid (c) Acceleration due to gravity (d) All of the above

The velocity of a body is given by the equation $v = a + bx$ , where $x$ is displacement. The unit of $b$ is ……. (a) $\mathrm{s^{-1}}$ (b) $\mathrm{s}$ (c) $\mathrm{ms^{-1}}$ (d) $\mathrm{ms^{-2}}$

The unit of power is ………. (a) $\mathrm{kg\,m^{2}s^{-2}}$ (b) $\mathrm{kg\,m^{2}s^{-1}}$ (c) $\mathrm{kg\,m\,s^{-2}}$ (d) $\mathrm{kg\,m^{2}s^{-3}}$

Which of the following is a vector quantity? (a) Electric field intensity (b) Electric current (c) Pressure (d) Gravitational potential

The image of an object formed by a device is always virtual and small. The device may be …… (a) Convex mirror (b) Concave mirror (c) Convex lens (d) A glass plate

The refractive index of a medium is greater for …….. (a) Red light (b) Green light (c) Yellow light (d) Violet light

A body thrown upward has a velocity of 5 m/s at a height of 10 m. The maximum height attained by the body is ………. ( $g = 10\ \text{m/s}^2$ ) (a) 22.5 m (b) 11.25 m (c) 15.25 m (d) 20.25 m

A man of mass $m$ can lift a load double his weight on the surface of the earth. The quantity of load he can lift on the surface of the moon is ……. (a) $mg$ (b) $mg/3$ (c) $2mg$ (d) $12mg$

A car is moving with a uniform speed of 25 m/s by applying a force of 25 N. The power developed in the car is ……. (a) 625 watt (b) 600 watt (c) 675 watt (d) 650 watt

A simple machine has 50% efficiency. The velocity ratio (V.R.) of the machine is equal to …… (a) Mechanical advantage (b) 2 × Mechanical advantage (c) $\frac{1}{2}$ × Mechanical advantage (d) 4 × Mechanical advantage

The velocity of sound in air is independent of ……… (a) Temperature (b) Density (c) Humidity (d) Pressure

If the critical angle of a material is $30^\circ$ , then the refractive index of the same material is …… (a) 1.5 (b) 2 (c) 1.33 (d) 1

Two resistors each of resistance $2\ \Omega$ are connected in series and then in parallel. The ratio of the resultant resistance in series to the resultant resistance in parallel is …… (a) 2 : 1 (b) 1 : 2 (c) 4 : 1 (d) 1 : 4

The temperature of a patient is $40^\circ$ C. This temperature on the Fahrenheit scale will be …… (a) $104^\circ$ F (b) $72^\circ$ F (c) $96^\circ$ F (d) $100^\circ$ F

At what height from the earth's surface does the value of $g$ become one-fourth of its value at the earth's surface? ( $R$ is the radius of the earth) (a) $R$ (b) $\frac{R}{2}$ (c) $\frac{R}{4}$ (d) $\frac{3R}{4}$

A car moves with the speed of 40 km/hr for the first half distance and 60 km/hr for the second half distance. The average speed of the car is ……….. (a) 45 km/hr (b) 48 km/hr (c) 50 km/hr (d) 54 km/hr

The scale of temperature having no negative temperature is …… (a) Kelvin scale (b) Celsius scale (c) Fahrenheit scale (d) Reaumur scale

A car moves with the speed of 40 Km/hr for the first half distance and 60 Km/hr for second half distance. The average speed of car is ……….. (a) 45 Km/hr (b) 48Km/hr (c) 50 Km/hr (d) 54 Km/hr

The scale of temperature having no negative temperature is …… (a) Kelvin scale (b) Celsius scale (c) Fahrenheit scale (d) Reaumer scale

A difference of temperature of $25^\circ$ C is equivalent to a difference of ……… (a) $32^\circ$ F (b) $25^\circ$ F (c) 25 K (d) $72^\circ$ F

Which of the following is not a source of light? (a) Sun (b) Moon (c) Star (d) none

A difference of temperature of 25°C is equivalent to a difference of ……… (a) 32°F (b) 25°F (c) 25K (d) 72°F

Which of the following is not a source of heat? (a) Sun (b) Candle (c) Blanket (d) none

Which of the following is not a unit of time? (a) second (b) light year (c) tropical year (d) minute

What is the gravity of earth (in $\text{m/s}^2$ )? (a) 9.8 (b) 8.9 (c) 7.8 (d) 8.6