Question

cassy can get more force on the bricks she breaks with a blow of her bare hand when ______. view available hint(s) her hand is made to bounce from the bricks does so with great determination she toughens her hand beforehand she exerts follow-through submit

Explanation:

To determine when Cassy gets more force on the bricks, we analyze the physics concept of impulse (\(J = F\Delta t=\Delta p\), where \(J\) is impulse, \(F\) is force, \(\Delta t\) is time, and \(\Delta p\) is change in momentum). When the hand bounces, the change in momentum (\(\Delta p\)) is larger (since velocity reverses, so \(\Delta p = m(v_f - v_i)\) with \(v_f\) opposite to \(v_i\), increasing magnitude). A larger \(\Delta p\) with the same or shorter \(\Delta t\) (due to bounce) leads to a larger force. Determination, toughening the hand, or follow - through don't relate to the momentum - force relationship as directly as the bounce (which affects momentum change).

Answer:

A. her hand is made to bounce from the bricks