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?

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

FREE Expert Solution
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?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Push-Away Problems With Energy concept. You can view video lessons to learn Push-Away Problems With Energy. Or if you need more Push-Away Problems With Energy practice, you can also practice Push-Away Problems With Energy practice problems.

How long does this problem take to solve?

Our expert Physics tutor, Julia took 3 minutes and 29 seconds to solve this problem. You can follow their steps in the video explanation above.

What professor is this problem relevant for?

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.