A strange cat with a mass mc is sitting at rest on the left sled of a pair of identical sleds. The sleds have mass ms and sit on frictionless ice. Suddenly, the cat leaps to the right sled, traveling with a horizontal speed vcg measured with respect to the ground. The instant the cat reaches the right sled, it turns around and leaps back to the left sled. The horizontal component of the cat’s speed is again vcg measured with respect to the ground.
What is impulse imparted to right sled by cat?
(A) 2mcvcg
(B) mcvcg
(C) 2(mc + ms)vcg
(D) zero