A2L Item 021

  • 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.

The two blocks shown below are identical. In case A the block sits on a horizontal surface and in case B the block is in free fall.

Which of the following statements are true regarding the reaction force to the gravitational force exerted on each block?

  1. In case A the reaction force is the Normal force.
  2. In case B the reaction force is zero.
  3. The reaction force is larger in A than B.
  4. All the above are true.
  5. Only (1) & (2) are true.
  6. None of the above are true.
  7. Cannot be determined.