HSC Physics Moving Reference Frames

A tutorial sheet of questions on a moving object seen in a moving reference frame is given below.

  1. A bus moves to the west at a constant velocity. A ball is released from rest relative to the bus. Describe the path of the ball (a) relative to the bus (b) relative to the ground.
  2. A bus is moving to the east with a constant acceleration to the east. A ball is released from rest relative to the bus. Describe the path of the ball (a) relative to the bus (b) relative to the ground.
  3. A bus is moving to the east with a constant acceleration to the west. A ball is released from rest relative to the bus. Describe the path of the ball (a) relative to the bus (b) relative to the ground.
  4. An elevator is moving upwards at a constant velocity. A ball is thrown horizontally inside the elevator. Describe the path of the ball (a) relative to the elevator (b) relative to the ground.
  5. An elevator is moving upwards with a constant acceleration upwards. A ball is thrown horizontally inside the elevator. Describe the path of the ball (a) relative to the elevator (b) relative to the ground.
  6. A boy and a girl sit at opposite ends of the diameter on a rotating table. At a certain instant the boy is moving to the west and the girl to the east. The girl throws a ball that is caught by the boy. Describe the initial velocity components of the ball (a) relative to the table, (b) relative to the ground.
  7. A simple pendulum has a period of oscillation T. The pendulum is supported over the centre of a rotating reference frame of period of revolution P. Find the period of oscillation of the pendulum in the rotating reference frame when (a) P = T, (b) P > T, (c) P < T