Here is an extract from a textbook. "While jumping or diving or on a trampoline a person will experience apparent weightlessness for a very short time. They will be in 'free fall'. It is much easier in these conditions to move your arms and legs since the force of gravity does not need to be overcome. Standing still and holding your arms out horizontally can be very tiring but a diver or gymnast in motion can move their limbs easily." Is this correct? Moving ones arms out horizontally when in free fall while trampolining is just as difficult as when standing on the ground because the graviational force on your arms is constant when in free fall or not near the earth.