Question

why does the rebounding collision result in a greater impulse? changing directions involves a greater velocity change than simply stopping. it happens over a shorter time. it takes longer. its actually less; mr. h made a mistake. rewatch

Explanation:

Impulse is equal to the change in momentum ($J = \Delta p = m\Delta v$). In a rebounding collision, the object changes direction. This means a larger change in velocity compared to just stopping. For example, if an object has an initial velocity $v$ and rebounds with velocity $-v$, the change in velocity is $2v$. While if it just stops, the change in velocity is $v$. A greater change in velocity leads to a greater impulse.

Answer:

Changing directions involves a greater velocity change than simply stopping.