Homework Help: 11th grade

Posted by fgh on Tuesday, November 16, 2010 at 3:54pm.

A 40-kg skater is standing still in front of a wall. By pushing against the wall she propels herself backward with a velocity of -1.8 m/s. Her hands are in contact with the wall for 0.80 s. Ignore friction and wind resistance. Find the magnitude and direction of the average force she exerts on the wall (which has the same magnitude, but opposite direction, as the force that the wall applies to her).

11th grade - bobpursley, Tuesday, November 16, 2010 at 4:09pm
avgforce*time= mass*changevelocity
This is the force the wall exerts on her, reverse the direction for her force.

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