Question

Two ice skaters, Anne and Steve, face each other while at rest, and then push against each other's hands. The mass of Steve is twice that of Anne. How do their speeds compare after they push off?
A.Anne's speed is one-fourth of Steve's speed.
B.Anne's speed is two times Steve's speed.
C.Anne's speed is the same as Steve's speed.
D.Anne's speed is one-half of Steve's speed.
E.Anne's speed is four times Steve's speed.

Answer 1

By conservation of momentum

mv = mv

Since Steve's mass is Twice Anne's, Anne's velocity must be twice Steve's

Choice B