Homework Help: physics

Posted by CiNdY on Sunday, October 10, 2010 at 11:55am.

A 50-kg woman and a 25-kg boy stand motionless facing each other on friction-free roller blades. The woman pushes the boy, who moves away at a speed of 5.0 m/s. What is the woman’s speed in the opposite direction?

physics - drwls, Sunday, October 10, 2010 at 1:02pm
Here's a clue (from the law of cnservation of momentum)

Their momenta are equal and opposite, so that the total momentum remains zero.

M1*V1 = -M2*V2
V2/V1 = ?

Answer this Question

Related Questions

science - 5a 30 kg girl and a 25 kg boy face each other on friction -free roller...
PHYSICAL SCIENCE - A 30 KG GIRL AND A 25 KG BOY FACE EACH OTHER ON FRICTION-FREE...
physical science - a 30 kg girl and a 25 kg boy face each other on friction-free...
physical science - a 30 kg girl and a 25 kg boy face each other on friction-free...
Physical Science - A 30 kg girl and a 25 kg boy face each other on friction-free...
science - A 30kg girl and a 25 kg boy face each other on friction free roller ...
Physical Science - a 30 kg girl and a 25 kg boy face each other on a friction-...
physics - A boy on roller blades throws a jug of water away from himself, giving...
Science Check - 1)Two balls having the same mass of 1 kg roll toward each other...
Physics - Two skaters, a man and a woman, are standing on ice. Neglect any ...

For Further Reading

First Name:
School Subject:
Answer: