Intro to Conservation of Energy Video Lessons

Video Thumbnail

Concept

Problem: A man with mass exttip{m}{m} sits on a platform suspended from a movable pulley, as shown in the figure , and raises himself at constant speed by a rope passing over a fixed pulley. The platform and the pulleys have negligible mass. Assume that there are no friction losses.Find the force he must exert.Find the increase in the energy of the system when he raises himself a distance exttip{x}{x}. (Answer by calculating the increase in potential energy.)Find the increase in the energy of the system when he raises himself exttip{x}{x}. (Answer by computing the product of the force on the rope and the length of the rope passing through his hands.)

FREE Expert Solution
95% (154 ratings)
Problem Details

A man with mass sits on a platform suspended from a movable pulley, as shown in the figure , and raises himself at constant speed by a rope passing over a fixed pulley. The platform and the pulleys have negligible mass. Assume that there are no friction losses.

Find the force he must exert.

Find the increase in the energy of the system when he raises himself a distance . (Answer by calculating the increase in potential energy.)

Find the increase in the energy of the system when he raises himself . (Answer by computing the product of the force on the rope and the length of the rope passing through his hands.)

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 Intro to Conservation of Energy concept. You can view video lessons to learn Intro to Conservation of Energy. Or if you need more Intro to Conservation of Energy practice, you can also practice Intro to Conservation of Energy practice problems.