(Solved):   37 A student throws a ball in the positive direction vertically upwards. The ball makes an ...

 

37 A student throws a ball in the positive direction vertically upwards. The ball makes an elastic collision with the ceiling, rebounds and accelerates back to the student's hand in a time of \( 1.2 \mathrm{~s} \). Which graph best represents the acceleration of the ball from the moment it leaves the hand to the instant iust hefore it returns to the hand?