2:00 - 2:45
Loop-the-Loop!
A curved track is set up on the lab bench at the front of the lab. Your group will be asked to predict the position that a steel ball bearing will reach after being released from rest at the top of the track. Specifically you will be required to predict the vertical location of the ball bearing when it is 0.40 m away (in the horizontal direction) from the point of exit from the track. You will need to make all the necessary measurements to enable you to carry out this task. We will test your prediction at 2:45. You have a maximum of 45 minutes to answer the question. A complete, correct solution is worth 8 marks.
2:45 - 3:30
Skidding Pool Ball
Examine the video clip on the right to demonstrate that the ball, when originally struck by the cue skidded and then eventually began to roll without slipping. Provide evidence that this occurs and tell when pure rolling began. From the data collected estimate the kinetic coefficient of friction between the ball and the felt surface that it skids/rolls on. A complete, correct solution is worth 8 marks.
(The horizontal scale of the clip is 0.79 m, mass of the ball is 170 g and diameter of the ball is 63 mm)
