a. How much work does an elevator motor do to lift a 1000kg elevator a height of 100m?

b. How much power must the motor supply to do this in50 s at constant speed?

Short Answer

Expert verified

a). work done by elevator motor is 9.8·105J

b). power is19620W

Step by step solution

01

Step 1. Given information

mass m=1000kg

heighth=100m

02

Step 2. Work done by elevator motor

work that elevator motor does to elevator is equal to difference in potential energy

Emotor=Epotential=mgh=1000kg·9.8m/s2·100m=9.81·105J

03

Step 3. Find the power

power is defined as the rate at which transfer energy(in our case work done by elevator motor) Then we have,

P=Emotort=9.81·105J50s=19620W

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

See all solutions

Recommended explanations on Physics Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free