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## Homework Statement

A girl of mass 48kg runs toward her sationary 2.0kg skateboard and jumps on. The horizontal velocity of the girl just before she makes contact with the skateboard is 4.0m/s to the right. Disregard the effects of friction.

a)Determine the velocity of the girl after she has landed on the skateboard.

b)The girl then travels at this speed for a short time before jumping off, still traveling at the same speed as the skateboard. What is the velocity of the skateboard after she jumps off.

## Homework Equations

p0=pf

(m1)(v01) + (m2)(v01) = (m1)(vf1) + (m2)(vf2)

## The Attempt at a Solution

ok for b:

48kg * 4.0m/s = 50kg(v2)----> is this ok to consider skateboard and girl one

v2 =3.84m/s

ok for c) since she jumps off and has the same velocity, that means the skateboard will also have the same velocity