set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

The acceleration due to gravity of a destructive Earthquake will be

a) >750 cm/$s^2$

b) >550 cm/$s^2$

c) >950 cm/$s^2$

d) >980 cm/$s^2$

Question : 2

The two balls of iron and wood of same weight dropped from the same height, then

a) One falls first, another falls later

b) They reach the ground (Earth) at the same time

c) The wooden ball falls later

d) They reach the ground after some gap

Question : 3

If an apple is released from an orbiting spaceship, it will

a) Move at a lower speed

b) Fall towards the Earth

c) Move along with the spaceship at the same speed

d) Move at a higher speed

Question : 4

If the radius of the Earth were to shrink by one percent, its mass remaining the same, the value of g on the Earth’s surface would

a) Increase by 2%

b) Increase by 0.5%

c) Decrease by 0.5%

d) Decrease by 2%

Question : 5

Earth’s escape velocity is

a) 21.1 km/s

b) 15.0 km/s

c) 7.0 km/s

d) 11.2 km/s

Question : 6

If the gravitational force of the Earth suddenly disappears, which are of the following will be the correct consequence?

a) The mass of the object will become zero but the weight will remain the same

b) The weight of an object will become zero but the mass will remain the same

c) Both the mass and the weight of the object will become zero

d) The mass of the object will increase