Question

A 48-kg girl stands on a 8-kg wagon holding two 19.5-kg weights. She throws the weights horizontally off the back of the wagon at a speed of 9.0 m/s relative to herself.
- Assuming that the wagon was at rest initially, what is the speed of the girl after she throws both weights at the same time?
- Assuming that the wagon was at rest initially, what is the speed with which the girl will move after she throws the weights one at a time, each with a speed of 9.0 m/s relative to herself?
thankyou

Answer 1

Ah, I just did this about an hour ago.

Answer 2

http://www.jiskha.com/display.cgi?id=1449357347

Answer 3

I did the hard part. I assume you can do the both at the same time part.