A man standing inside a room of length L rolls a ball along the floor at time t = 0. The ball travels at constant speed v relative to the floor, hits the front wall (B) and rebounds back with same speed v. The man catches the ball back at the wall A at time t_(0). The ball travelled along a straight line relative to the man inside the room. Another observer standing outside the room found that the entire room was travelling horizontally at constant velocity v in a direction parallel to the two walls A and B. (a) Find the average speed of the ball in the time interval t = 0 to t = t_(0) as observed by the observer outside the room. (b) If the room hasacceleration in the direction of its velocity draw a sketch of the path of the ball as observed by the observer standing outside. Assume that velocity of room was vat the instant the ball was released.

A man standing inside a room of length L rolls a ball along the floor

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