Question

5a 30 kg girl and a 25 kg boy face each other on friction -free roller blades . the girl pushes the boy ,who moves away at a speed of 1.0 m/s . the girls speed is how many m/s /

Answer 1

m1v1 = m2v2

(30kg)(v1)=(25kg)(1.0m/s)

solve for v1

Answer 2

0.45