AP Physics 1· difficulty 3/5
The graph shows force vs time during a ball's collision with a wall. The total impulse on the ball is
Always positive
Difference of two triangle areas (opposite signs)
Sum of two triangle areas (same sign)
Always zero
Explanation
The first lobe is positive force, the second is negative. Net impulse is the (signed) area, i.e. the difference of magnitudes.
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