Carts a and B Have Equal Masses and Travel Equal

Multiple Choice

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) W_A = 4 W_B.
B) W_A = 2 W_B.
C) W_A = W_B.
D) W_B = 2 W_A.
E) W_B = 4 W_A.