Question

A ball is vertically thrown upwards from point a. It reaches to the highest point b and returns

Answer 1

CT5: The answer is 3. The ball reaches its highest point when its velocity is zero; the acceleration of gravity is never zero (it is always 9.8 m/s2 downward) Neglecting air drag, the acceleration will be -g at all points in the trajectory. The object's acceleration will be 9.8m/s/s at its highest point and at all other points. It's velocity at the highest point will be 0, if thrown perfectly vertically.