A ball is thrown vertically upwards under the influence of gravity. Suppose observer A films this motion and play the tape backwards (so the tape begins with the ball at its highest point and ends with it reaching the point from which it was released), and another observer `B` observes the motion of the ball from a frame of reference moving at constant velocity which is equal to the initial velocity of the ball. The ball has a downward acceleration according to obsever.

Options

A. A and B
B. only A
C. only B
D. neither

Answer

A

Explanation

Acceleration w.r.t both will be downwards as acceleration of both frams themselves is zero