Q 1 – Two objects of different masses falling freely near the surface of the moon would
(a) have same velocities at any instant
(b) have different acceleration
(c) experience forces of same magnitude
(d) undergo a change in their inertia
Q 2 – Herbat goes on a space mission to moon. His weight on Earth is 78 N, while his weight on moon is just 13N. Herbat’s weight decreases on moon because
a) Earth’s radius is greater than that of moon
b) Earth’s gravitational pull is greater than that of moon
c) Herbat’s density changes on moon
d) Herbat’s mass changes on moon
Q 3 – The value of acceleration due to gravity
(a) is same on equator and poles
(b) is least on poles
(c) is least on equator
(d) increases from pole to equator
Q 4 – In the relation F = GM mld2, the quantity G
(a) depends on the value of g at the place of observation
(b) is used only when the Earth is one of the two masses
(c) is greatest at the surface of the Earth
(d) is universal constant of nature
Q 5 – A ball is thrown from a height. The path of the ball is shown in the given figure.
The net force on the ball is directed
a) toward the right
b) toward the left
c) downward
d) upward
Q 6 – Two particles are placed at some distance. If the mass of each of the two particles is doubled, keeping the distance between them unchanged, the value of gravitational force between them will be
(a) 1/4 times
(b) 4 times
(c) 1/2 times
(d) unchanged
Q 7 – Water falls as drops from clouds. This happens when the water vapour present in clouds condenses.
These water drops fall on ground because of
a) solar energy
b) frictional force
c) chemical energy
d) gravitational force
Q 8 – Nikki throws a ball upward with a velocity of 25 m/s. The ball return to him after
a) 1.25 s
b) 2.55 s
c) 5.10 s
d) 7.65 s
Q 9 – The weight of an object at the centre of the Earth of radius R is
(a) zero
(b) infinite
(c) R times the weight at the surface of the Earth
(d) 1/R2 times the weight at surface of the Earth
Q 10 – Which of the following tools can be used to measure weight?
a) spring balance
b) ruler
c) watch
d) measuring cyclinder
Q 11 – A stone is dropped from a tower of height 80 metres. What is its distance from the ground after three seconds?
a) 47.3 m
b) 31.4 m
c) 35.9 m
d) 44.1 m
Q 12 – A girl stands on a box having 60 cm length, 40 cm breadth and 20 cm width in three ways. In which of the following cases, pressure exerted by the box will be
(a) maximum when length and breadth form the base
(b) maximum when breadth and width form the base
(c) maximum when width and length form the base
(d) the same in all the above three cases
Q 13 – When a ball is released from a height, it will fall because of gravitational force. The ball will fall with
a) constant speed
b) decreasing speed
c) constant acceleration
d) increasing acceleration
Q 14 – A traveller moves from the equator to one of the poles of earth. The weight of the traveler i continuously, whereas his mass ii .
The information in which alternative completes the given statement?
a)
| i | ii |
| Decreases | Increases continously |
b)
| i | ii |
| increases | Remains unaffected |
c)
| i | ii |
| Decreases | Remains unaffected |
d)
| i | ii |
| increases | decreases continously |
Q 15 – An object weighing 120 N on moon , is brought back onto the surface of earth . the acceleration due to gravity on moon is one-sixth of that on earth . What will be the change in the weight of the object ?
a) -360 N
b) -480 N
c) + 600 N
d) +720 N
Q 16 – The mass and diameter of Saturn and Jupiter are listed in the given table . two identical probes are sent to both the planets to gather more information about their atmospheric compositions.
| Planet | Mass (kg) | Diameter (km) |
| Saturn | 5. 68 × 10 25 | 1. 20 × 10 5 |
| Jupiter | 1.89 × 10 27 | 1.43 × 105 |
What will be the approximate ratio of the weight of the probe on Saturn to that on Jupiter ?
a)1: 32
b) 1: 25
c) 25 : 1
d) 32 : 1
Q 17 – An astronaut weighs 112 N on moon , s Surface the acceleration due to gravity on moon is one – sixth of that on earth. What is the mass of the astronaut on earth, Surface?
a) 64. 51 kg
b) 68 .71 kg
c) 72 .51 kg
d) 76 . 71 kg
Q 18 – The weight of a few books is measured using a spring balance. Now, the mass of these books is measured using a beam balance.
Which statement about the mass and weight of the books is correct?
a) weight of the books will not vary with location.
b) Mass of the books is greater than their magnitude of weight.
c) Magnitude of weight of the books is greater than their mass.
d) Mass of the books will vary with location.
Q 19 – When a mango falls from a mango tree then
(a) only the Earth attracts the mango.
(b) only the mango attracts the Earth.
(c) both the mango and the Earth attract each other.
(d) both the mango and the Earth repel each other.
Q 20 – Law of gravitation gives the gravitational force between:
(a) the earth and a point mass only
(b) the earth and sun only
(c) any two bodies having some mass
(d) two charged bodies only
Q 21 – A Substance weighs 100 N. If acceleration due to gravity is 9.8 ms-2, then mass of the given substance will be
a) 10 kg
b) 40 kg
c) 60 kg
d) 90 kg
Q 22 – The SI unit of pressure is
(a) Nm2
(b) N/m
(c) N/m2
(d) N2/m2
Q 23 – An apple falls from a tree because of gravitational attraction between the Earth and the apple. If F1 is the magnitude of force exerted by the Earth on the apple and F2 is the magnitude of force exerted by the apple on the Earth, then
(a) F1 is very much greater than F2
(b) F2 is very much greater than F1
(c) F1 is only a little greater than F2
(d) F1 and F1 are equal
Q 24 – Mark’s weight on Earth is 98 N. The value of acceleration due to gravity on Neptune is 10.78 m/s2. Mark’s weight on Neptune will be
a) 87.8 N
b) 97.8 N
c) 117.8 N
d) 107.8 N
Q 25 – The force of attraction between two unit point masses separated by a unit distance is called
(a) gravitational potential
(b) acceleration due to gravity
(c) gravitational field
(d) universal gravitational constant
Q 26 – Law of gravitation gives the gravitational force between
(a) the Earth and a point mass only
(b) the Earth and Sun only
(c) any two bodies having some mass
(d) two charged bodies only
Q 27 – Nancy’s teacher told her that the value of gravity on Jupiter is 2.6 times the value of gravity on Earth. Nancy weighs 45 N on Earth. Nancy’s weight on Jupiter wiil be
a) 90 N
b) 45 N
c) 117 N
d) 108 N
Q 28 – The unit of G in the S.I. system is:
(a) Newton m2/kg2
(b) Newton m2 kg2
(c) Newton m kg
(d) Newton m2/kg
Q 29 – The unit of weight in the S.I. system is:
(a) kg m2
(b) Newton
(c) ms-2
(d) ms
Q 30 – When an object is released from a height, its initial velocity is:
(a) u = 100 ms-1
(b) u = 9.8 ms-1
(c) u = 0
(d) u = 1/2
Q 31 – The mass of the earth is:
(a) 6.4 × 1024
(b) 6 × 1010 kg
(c) 6 × 1024 kg
(d) 6 × 1019 kg
Q 32 – The radius of the earth is:
(a) 6.4 × 10-6 m
(b) 6.4 × 106 m
(c) 4.6 × 106 m
(d) 6.4 × 104 m
Q 33 – The value of acceleration due to gravity:
(a) is the same on the equator and poles
(b) is least on poles
(c) is least on the equator
(d) increases from pole to equator
Q 34 – The value of quantity G in the law of gravitation:
(a) depends on the mass of earth only
(b) depends on the radius of the earth only
(c) depends on both the mass and radius of the earth
(d) is independent of the mass and radius of the earth