A2L Item 006

  • warning: Parameter 1 to theme_field() expected to be a reference, value given in /home/ibeatty/clickercentral.net/includes/theme.inc on line 171.
  • warning: Parameter 1 to theme_field() expected to be a reference, value given in /home/ibeatty/clickercentral.net/includes/theme.inc on line 171.
  • warning: Parameter 1 to theme_field() expected to be a reference, value given in /home/ibeatty/clickercentral.net/includes/theme.inc on line 171.
  • warning: Parameter 1 to theme_field() expected to be a reference, value given in /home/ibeatty/clickercentral.net/includes/theme.inc on line 171.
  • warning: Parameter 1 to theme_field() expected to be a reference, value given in /home/ibeatty/clickercentral.net/includes/theme.inc on line 171.
  • warning: Parameter 1 to theme_field() expected to be a reference, value given in /home/ibeatty/clickercentral.net/includes/theme.inc on line 171.

Which of the following motions has a zero value for the average acceleration during the specified time interval?

A. A race car makes one lap around an oval track at constant speed. The time interval is the time to complete the lap.

B. A cart collides with a wall and rebounds with the same speed. The time interval is the time during which the cart is in contact with the wall.

C. A ball rolls up, then down a hill. The time interval is the time the ball is on the hill.

  1. Only (A)
  2. Only (B)
  3. Only (C)
  4. Both (A) and (B)
  5. Both (A) and (C)
  6. Both (B) and (C)
  7. All three motions have zero average acceleration
  8. None has zero average acceleration
  9. Can’t be determined