A person carries a mass of 10 kg and walks along the +x-axis for a distance of 100 m with a constant velocity of 2 m/s. What is the work done by this person?
A) 0 J
B) 20 J
C) 200 J
D) 1000 J
E) None of the other choices is correct.

Question

Quizplus · Accepted Answer

Work done is defined as force multiplied by displacement in the direction of the force. In this case, the person is carrying the mass and walking with a constant velocity, which means there is no net force acting on the system. Therefore, the work done by the person carrying the mass is zero.

A Person Carries a Mass of 10 Kg and Walks