Problem: A 75-kg roofer climbs a vertical 7.0-m ladder to the flat roof of a house. He then walks 12 m on the roof, climbs down another vertical 7.0-m ladder, and finally walks on the ground back to his starting point.How much work is done on him by gravity as he climbs up?How much work is done on him by gravity as he climbs down?How much work is done on him by gravity as he walks on the roof?What is the total work done on him by gravity during this round trip?On the basis of your answer to part E, would you say that gravity is a conservative or nonconservative force? Explain.How much work is done on him by gravity as he walks on the ground?

⚠️Our tutors found the solution shown to be helpful for the problem you're searching for. We don't have the exact solution yet.

FREE Expert Solution
Problem Details

A 75-kg roofer climbs a vertical 7.0-m ladder to the flat roof of a house. He then walks 12 m on the roof, climbs down another vertical 7.0-m ladder, and finally walks on the ground back to his starting point.

How much work is done on him by gravity as he climbs up?

How much work is done on him by gravity as he climbs down?

How much work is done on him by gravity as he walks on the roof?

What is the total work done on him by gravity during this round trip?

On the basis of your answer to part E, would you say that gravity is a conservative or nonconservative force? Explain.

How much work is done on him by gravity as he walks on the ground?

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 Work By Gravity & Inclined Planes concept. You can view video lessons to learn Work By Gravity & Inclined Planes. Or if you need more Work By Gravity & Inclined Planes practice, you can also practice Work By Gravity & Inclined Planes practice problems.