When you quickly jerk a cart forward that has a ball resting in the middle, the
A)front of the cart hits the ball.
B)back of the cart hits the ball.
C)neither, for the ball rides along in the middle as the cart moves forward.
D)All of the above depending on how quickly the cart is pulled.

Question

Quizplus · Accepted Answer

When you quickly jerk a cart forward, the ball appears to move backward relative to the cart due to inertia, meaning the back of the cart hits the ball. The ball itself does not actually move backward; it simply does not accelerate as quickly as the cart does, due to its inertia.

When You Quickly Jerk a Cart Forward That Has a Ball