A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
A 50 kg box is raised by an elevator system to a position 10 m high.
A) how much work is done on the box?
B) because of friction losses an electric motor must generate a force of 800 N to raise the box. How much work does the motor do while raising the box?
C) if it takes 20 seconds to raise the box what is the power output of the motor?
D) when the box reaches the top it is transferred to a horizontal conveyor which carries the box 20 meters. How much work is done on the box by the horizontal conveyor?
anonymous
 one year ago
A 50 kg box is raised by an elevator system to a position 10 m high. A) how much work is done on the box? B) because of friction losses an electric motor must generate a force of 800 N to raise the box. How much work does the motor do while raising the box? C) if it takes 20 seconds to raise the box what is the power output of the motor? D) when the box reaches the top it is transferred to a horizontal conveyor which carries the box 20 meters. How much work is done on the box by the horizontal conveyor?

This Question is Closed

matt101
 one year ago
Best ResponseYou've already chosen the best response.1A) By conservation of energy, the work done on the box is equal to the gravitational potential energy the box gains, mgh. B) Another definition of work is force times distance over which the force is applied (W=Fd). You can use this relationship to calculate work. C) Power refers to the energy expenditure over time, in this case, P=W/t. You calculated work in the previous question and have time given, so use this information to find power. D) The work done by the conveyor belt can also be found using W=Fd. The force in this case is going to be the frictional force, but you need additional information to calculate what that force would be (e.g. the coefficient of static friction).
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.