Carts A and B have equal masses and travel equal distances on straight frictionless tracks while a constant force F is applied to A, and a constant force 2F is applied to B. The relative amounts of work done by the two forces are related by:
A)WA = 4 WB.
B)WA = 2 WB.
C)WA = WB.
D)WB = 2 WA.
E)WB = 4 WA.

Question

Quizplus · Accepted Answer

Work done is the product of force and distance. Since both carts travel equal distances, the work done on cart B (WB) is twice that on cart A (WA) because the force on B is 2F compared to F on A.

Carts a and B Have Equal Masses and Travel Equal