A 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?

Question

A 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?

bobpursley · Answer

The boys change of momentum is equal and opposite to the girls change of momentum. GirlMomentum=-Boy momentum 30kg*V=-25kg*1.0m/s

Anonymous · Answer

0.83