Acceleration Lab: Exercise 2

Tilted air-track: This animation shows the graph of position versus time and velocity versus time for a block or cart sliding up and then down an inclined plane.  Did it agree with your prediction?  Why or why not?   What happens at t=5 seconds? If an object is moving toward the sonic ranger, is the velocity positive or negative?  (Does this animation agree with your experience of the sonic ranger in lab last week)?  When is the velocity zero?  Where is the block located when the velocity is zero?  One "bounce" of the block is defined as one complete trip from the bottom to the top and back to the bottom.  What is the time from the beginning of one bounce to the end of a bounce? Finally, explain the acceleration graph below: