Question

A ball is allowed to fall free from a tower of 320 me when the ball this is Halfway the acceleration suddenly disappears what will happen to the boys thereafter

Answer 1

The ball will stop according to Newton's 1st law which states that when a body is in motion it tends to be in motion and when a body is in rest it tends to be in rest if any external force is not applied. Here the external force that is gravitational pull is not there

Answer 2

Velocity gained by the ball after it falls freely upto halfway is v = √(u² + 2g.½h) [ball falls halfway]
v=√(0+2×9.8×320/2)m/s [since u=initial velocity=0, as the ball is at rest till the instant it is dropped]
=√(4×49×32)
= 2×7×4√2 = 56√2 m/s
After this, the pull of gravity disappears suddenly. So the ball now falls with a constant speed, without gaining any, due to the lack of any acting force (ignoring resistance offered by air), and thereby due to lack of any acceleration.