Q. A boy sitting in a rail road car throws a ball straight up into the air. The ball will fall back into his hands when the rail road car is (Solved)
1. moving at constant velocity
2. accelerating forward while going around a curve of radius equal to the maximum height attained by the ball
3. 107 dynes
4. accelerating forwardA block A is dropped down a smooth inclined plane, while another identical block B is released for free fall from the same height
5. decelerating
- a. moving at constant velocity