Question

In which of the following cases the net force in NOT Zero?

• A. A kite skillfully held stationary in the sky
• B. A ball freely falling from a height
• C. An aeroplane rising upwards at an angle of $45°$ with the horizontal with a constant speed
• D. A cork floating on the surface of water

Answer 1

The correct option is B

A ball freely falling from a height

Step-1:

When a ball falls from a certain height the body is experienced by gravitational forces and hence in this case net force is not zero.

Hence the correct option is (b).