# 9th Class Physics Gravitation Question Bank

### done Gravitation

• A) Its mass will change

B) Its weight will change but not mass

C) Both mass and weight will change

D) Its mass and weight both will remain same

• A) at the equator will be greater than at the poles

B) at the poles will be greater than at the equator

C) at the poles will be equal to the weight at the equator

D) depends upon the object

• A) It is a freely falling body.

B) It is moving with constant speed.

C) It is acted upon by a force directed away from the centre of the earth which counter balances the gravitational pull

D) Its angular momentum remains constant

• A) positive

B) negative

C) zero

D) may be positive or negative depending upon its initial velocity

• A) ${{m}^{2}}/s$

B) $\text{m}/{{\text{s}}^{\text{2}}}$

C) $\text{s}/{{\text{m}}^{\text{2}}}$

D) $\text{m}/\text{s}$

• A) ${{N}^{2}}-{{m}^{2}}/kg$

B) $N-{{m}^{2}}/kg$

C) $N-m/kg$

D) $N-{{m}^{2}}/k{{g}^{2}}$

• A) All bodies repel each other in this universe.

B) Our earth does not behave like a magnet.

C) Acceleration due to gravity is$\text{8}.\text{9 m}/{{\text{s}}^{\text{2}}}$.

D) All bodies fall at the same rate in vacuum.

• A) at the centre of the earth

B) inside the earth

C) on the surface of the earth

D) above the surface of earth

• A) $\frac{1}{4}$times

B) 4 times?

C) $\frac{1}{2}$times

D) 2 times

• A) uniform speed

B) uniform velocity

C) uniform acceleration

D) none of these

• A) $\frac{M}{6}$

B) $M$

C) $M+6$

D) zero

• A) is a vector quantity

B) of a body in interplanetary space is maximum

C) increases when the bodies go up

D) none of these

• A) $\text{8}.\text{9 m}/{{\text{s}}^{\text{2}}}$

B) $\text{8}.\text{9 m}/\text{s}$

C) $\text{9}.\text{8 m}/{{\text{s}}^{\text{2}}}$

D) $\text{9}.\text{8 m}/\text{s}$

• A) moves faster than the near earth satellite

B) has a time period less that of a near earth satellite

C) revolves about the polar axis

D) is stationary in space

• A) their separation

B) gravitational constant

C) product of their masses

D) all of these

• A) acts in the direction of the motion

B) acts in the opposite direction of the motion

C) remains constant as the body moves up

D) increases as the body moves up

• A) every where in the universe

B) at the surface of the earth only

C) inside the earth only

D) at the surface of the moon only

• A) 9.8 N

B) 980 N

C) 98 N

D) none of these

• A) 980 dynes

B) 9.80 dynes

C) 98 dynes

D) none of these

• A) nature of the interacting bodies

B) size of the interacting bodies

C) mass of the interacting bodies

D) all of these

• A) $\text{1}{{0}^{\text{3}}}$

B) $\text{1}{{0}^{\text{2}}}$

C) $\text{1}{{0}^{-\text{2}}}$

D) $\text{1}{{0}^{-\text{3}}}$

• A) $\text{1}{{0}^{\text{2}}}$

B) 10

C) $\text{1}{{0}^{-\text{1}}}$

D) $\text{1}{{0}^{-\text{2}}}$

• A) ${{m}^{3}}k{{g}^{-1}}{{s}^{-2}}$

B) ${{m}^{3}}k{{g}^{-2}}{{s}^{-1}}$

C) $\text{m k}{{\text{g}}^{-\text{3}}}\text{ }{{\text{s}}^{-\text{1}}}$

D) ${{\text{m}}^{\text{2}}}\text{ k}{{\text{g}}^{-\text{3}}}\text{ }{{\text{s}}^{-\text{2}}}$

• A) $\text{1}\text{.3}0\text{4 }\times \text{ 1}{{0}^{\text{4}}}\text{m}/\text{sec}$

B) $\text{13}.0\text{4 }\times \text{1}{{\text{0}}^{4}}\text{m}/\text{sec}$

C) $\text{1}\text{.3}0\text{4 }\times \text{1}{{\text{0}}^{\text{6}}}\text{m}/\text{sec}$

D) $1.304\,\times {{10}^{2}}m/sec$

• A) 1

B) infinity

C) zero

D) none of these

• A) 2

B) 4

C) 8

D) 8

• A) has the same value everywhere in space

B) has the same value everywhere on the earth

C) varies with the latitude on the earth

D) is greater on the moon due to its smaller diameter

• A) kg wt

B) N

C) g wt

D) none of these

• A) 9.8 N

B) $\frac{1}{9.8}N$

C) 980N

D) none of these

• A) measured by a spring balance

B) measured by a beam balance

C) measured in kg

D) a scalar quantity

• A) 4.8 hours

B) $48\sqrt{2}$ hours

C) 24 hours

D) $24\sqrt{2}$ hours

• A) $\sqrt{2}Rg$

B) $Rg$

C) $\sqrt{\frac{Rg}{2}}$

D) $\sqrt{Rg}$

• A) is the quantity of the matter it contains

B) refers to its inertia

C) is the same as its mass but is expressed in different unit

D) is the force with which it is attracted towards the earth

• A) $F\propto {{r}^{4}}$

B) $F\propto {{r}^{6}}$

C) $F\propto {{r}^{2}}$

D) $F\propto \frac{1}{{{r}^{2}}}$

• A) 1624 km

B) 2424 km

C) 2624km

D) 2826km

• A) 11 km/sec

B) 22 km/sec

C) 33 km/sec

D) 16.5 km/sec

• A) true weight

B) mass

C) gravitational mass

D) inertial mass

• A) weight only

B) mass only

C) mass and weight

D) none of these

• A) $\frac{1}{9}m$

B) $\frac{1}{10}m$

C) $\frac{1}{11}m$

D) $\frac{10}{11}m$

• A) $0.\text{414R}$

B) R

C) 2R

D) 3.5R

• A) $\frac{4\pi G}{3gR}$

B) $\frac{3\pi R}{4gG}$

C) $\frac{3g}{4\pi RG}$

D) $\frac{\pi g}{12RG}$

• A) less than M kg wt

B) more than M kg wt

C) equal to M kg wt

D) zero

• A) $mM=2$

B) $m=\frac{M}{2}$

C) $M={{m}^{2}}$

D) none of these

• A) $\text{6}.\text{6 }\times \text{ 1}{{0}^{9}}\text{ joule}$

B) $-\text{ 6}.\text{6 }\times \text{ 1}{{0}^{\text{9}}}\text{ joule}$

C) $\text{6}.\text{6 }\times \text{ 1}{{0}^{-\text{9}}}\text{ joule}$

D) $-\text{ 6}.\text{6 }\times \text{ 1}{{0}^{-\text{9}}}\text{ joule}$

• A) $+\frac{k}{r}$

B) $-\frac{k}{2r}$

C) $-\frac{\text{ 2K}}{r}$

D) $+\frac{\text{ K}}{{{r}^{2}}}$

• A) 2.83 km/s

B) 3.28 km/sec

C) 6.68 km/s

D) 8.32 km/sec

• A) $\frac{g}{2}$

B) $\frac{g}{3}$

C) $\frac{g}{7}$

D) $\frac{g}{5}$

• A) ${{r}_{1}}^{\frac{3}{2}}$

B) ${{r}_{2}}^{\frac{3}{2}}$

C) $\frac{{{({{r}_{1}}+{{r}_{2}})}^{\frac{3}{2}}}}{2}$

D) $\frac{{{({{r}_{1}}-{{r}_{2}})}^{\frac{3}{2}}}}{2}$

• A) 16 joules

B) 160 joules

C) 32 joules

D) 320 joules

• A) 2.35 hours

B) 23.5 hours

C) 3.25 hours

D) 32.5 hours

• A) $\text{2}.\text{15 }\times \text{ 1}{{0}^{\text{3}}}\text{ rad}/\text{sec}$

B) $\text{2}.\text{25 }\times \text{ 1}{{0}^{-\text{3}}}\text{ rad}/\text{sec}$

C) $\text{1}.\text{25 }\times \text{ 1}{{0}^{\text{3}}}\text{ rad}/\text{sec}$

D) $\text{1}.\text{25 }\times \text{ 1}{{0}^{-\text{3}}}\text{ rad}/\text{sec}$

• A) $g$

B) G

C) $E$

D) none of these

• A)

B)

C)

D)

• A) 889N

B) 8.89 N

C) 8889N

D) 88.9 N

• A) ${{M}_{m}}=\frac{1}{6}$

B) ${{M}_{m}}={{M}_{e}}$

C) ${{M}_{m}}=\sqrt{{{M}_{e}}}$

D) ${{M}_{m}}=6{{M}_{e}}$

• A) 30R

B) 15R

C) 6R

D) 5R

• A) $~\text{2}.\text{45m}{{\text{s}}^{-\text{2}}}$

B) $\text{4}.\text{9m}{{\text{s}}^{-\text{2}}}$

C) $\text{9}.\text{8m}{{\text{s}}^{-\text{2}}}$

D) $\text{19}.\text{6m}{{\text{s}}^{-\text{2}}}$

• A) $gR$

B) $\sqrt{gR}$

C) $\sqrt{\frac{g}{R}}$

D) $\frac{g}{R}$

• A) Weight of the body is zero

B) Mass of the body is zero

C) Both mass and weight becomes zero

D) Neither the weight nor the mass is zero.

• A) absence of inertia

B) absence of gravity due to earth

C) absence of accelerating force

D) free fall of the spaceship

• A) Centre of earth

B) Equator

C) Poles

D) Same everywhere

• A) 1N

B) 36 N

C) $\frac{1}{6}$N

D) 6N

• A) increase

B) decrease

C) remain unchanged

D) sometimes decrease and sometimes increase

• A) It is freely falling body

B) It experiences no acceleration

C) It is moving with constant speed

D) Its angular momentum is constant

• A) infinite

B) (6) zero

C) $\text{2 sec}$

D) cannot be calculated

• A) $\text{2}.\text{86 m}/{{\text{s}}^{\text{2}}}$

B) $\text{1}.\text{65 m}/{{\text{s}}^{\text{2}}}$

C) $\text{8}.\text{65 mi}{{\text{s}}^{\text{2}}}$

D) $\text{5}.\text{16 m}/{{\text{s}}^{\text{2}}}$

• A) It is more at the equator than at the poles

B) It is not effected by the rotation of the earth

C) It is effected by the rotation of the earth

D) It is not effected by the latitude

• A) $x=h$

B) $x=2h$

C) $x=\frac{h}{2}$

D) $x=\frac{h}{3}$

• A) 2

B) 3

C) 4

D) 5

• A) it is a satellite of earth

B) it does not have population

C) it is colder than earth

D) r.m.s velocity of all the gases is more than the escape velocity from its surface

• A) It will continue to move with the same speed along the original orbit of spacecraft

B) It will move with the same speed, tangentially to the spacecraft

C) It will fall down to the earth gradually

D) It will go very far in space