Multiple choice

A force of 100 N displaces a body through 5 m. If the change in kinetic energy is 400 J, the energy lost in friction is

  1. 100 J

  2. 200 J

  3. 300 J

  4. 400 J

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Work done = Force X displacement = 100 X 5 = 500 J Change in KE = 400 J Hence the energy lost in friction is 500 J - 400 J = 100 J