Physics

Problem

A train is moving along a straight line with a constant acceleration 'a'. A boy standing in the train throws a ball forward with a speed of

10 \text{ m/s}

, at an angle of

60^\circ

to the horizontal. The boy has to move forward by

1.15 \text{ m}

inside the train to catch the ball back at the initial height. The acceleration of the train, in

\text{m/s}^2

, is [Adv. 2011]