Push-Away Problems With Energy Video Lessons

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# Problem: A 65.0-kg boy and his 40.0-kg sister, both wearing roller blades, face each other at rest. The girl pushes the boy hard, sending him backward with velocity 2.90 m/s toward the west. Ignore friction.(a) Describe the subsequent motion of the girl.(b) How much potential energy in the girl’s body is converted into mechanical energy of the boy–girl system?

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###### Problem Details

A 65.0-kg boy and his 40.0-kg sister, both wearing roller blades, face each other at rest. The girl pushes the boy hard, sending him backward with velocity 2.90 m/s toward the west. Ignore friction.
(a) Describe the subsequent motion of the girl.
(b) How much potential energy in the girl’s body is converted into mechanical energy of the boy–girl system?

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Based on our data, we think this problem is relevant for Professor Schulte's class at UCF.

What textbook is this problem found in?

Our data indicates that this problem or a close variation was asked in Physics for Scientists and Engineers - Serway Calc 9th Edition. You can also practice Physics for Scientists and Engineers - Serway Calc 9th Edition practice problems.