Question

if the mythbuster crew continues to use more massive, (larger and larger) ball bearings, what do you expect to happen to the efficiency measurement?
it would stay the same
it would continue becoming more efficient
i would continue becoming less efficient

Explanation:

Step1: Consider friction factor

Larger ball - bearings have more mass.

Step2: Analyze energy loss

More mass means more gravitational force. Increased mass leads to higher normal force on the contact surface, increasing friction. Friction causes more energy loss, reducing efficiency.

Answer:

It would continue becoming less efficient