Physics
Physics
Problem
Calculate the average force that must be exerted to stop a cricket ball of mass moving at in . State its direction with respect to the initial motion of the ball.Intuitive explanation
This problem is about impulse and momentum change—the idea that force, time, and velocity change are all connected. The key insight is to use the impulse-momentum theorem: the average force you need depends on how quickly you want to reverse the ball's motion. Calculate the change in momentum, divide by the stopping time, and remember that the force must point opposite to the ball's initial direction to slow it down.
Intuitive explanation
This problem is about impulse and momentum change—the idea that force, time, and velocity change are all connected. The key insight is to use the impulse-momentum theorem: the average force you need depends on how quickly you want to reverse the ball's motion. Calculate the change in momentum, divide by the stopping time, and remember that the force must point opposite to the ball's initial direction to slow it down.