Motion under Gravity

Two balls A and B are of 10 kg. and 1 kg. respectively. They are dropped simultaneously from a height of 20 m. Which of the following is correct?

Two objects of different masses falling freely near the surface of the Moon would:

Assertion (A): The weight of human being on the Moon is 1/6 in comparison to Earth. Reason (R): The Moon does not have gravity like Earth. Select the answer from following codes – (a) Both (A) and (R) are true, and (R) is the correct explanation of (A). (b) Both (A) and (R) are true, but (R) is not the correct explanation of (A). (c) (A) is true, but (R) is false. (d) (A) is false, but (R) is true.

The weight of anybody is –

The weight of human body is –

If the spinning speed of the Earth increases, then the weight of the body at the equator will –

A smooth plane inclined at an angle θ with the horizontal as shown in the given figure. A body starts from rest and slides down on the inclined surface. The time taken by the body to reach the bottom is –

A ball is dropped from the top of a high building with a constant acceleration of 9.8 m/s². What will be its velocity after 3 seconds?

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:

The acceleration due to gravity of a destructive earthquake will be –