Question

A moving body has kinetic energy 100 J. The work done to stop the body is given by:

• A. 10J
• B. 20J
• C. 50J
• D. 100J

Answer 1

Answer:

D. 100J

• The Work-Energy Theorem states that the net work done on an object is equal to the change in its kinetic energy.

• Mathematically, W_net = ΔKE, where W_net is the net work done and ΔKE is the change in kinetic energy.

• W=0J-100J=-100J