A2L Item 138

  • 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.

A block slides along a frictionless surface and onto a slab with a rough surface. The plot on the right shows the velocity of the blue slab as a function of time. The slab has mass of 4kg and the block has mass of 2kg. If the block remains on top of the slab, what was its initial speed?

  1. 2 m/s
  2. 4 m/s
  3. 6 m/s
  4. 8 m/s
  5. 12 m/s
  6. None of the above
  7. Cannot be determined