Friday
October 24, 2014

Homework Help: Physics

Posted by Jacie on Thursday, January 6, 2011 at 3:41pm.

A 900W motor is used to lift 275.51kg of bricks a distance of 30, to the roof of the building.
a. If the motor ran for 90s how much work did it do?
b. What is the potential energy of the bricks?
I know how the calculate work, but I'm really confused about how to calculate it with the time and 900W motor.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Pysics - A small motor runs a lift that raises aload of bricks weighing 836N to ...
physics ---- really dnt get this at all - A small electric motor is used to ...
algebra - The power (P) required to run a motor is equal to the voltage (E) ...
Physics - A construction crew pulls up an 87.5-kg load using a rope thrown over ...
Physics - A construction crew pulls up an 87.5-kg load using a rope thrown over ...
Physics - An electric motor is rated to have a maximum power output of 0.72 hp. ...
physics - A small motor runs a lift that raises a load of bricks weighing 916 to...
physics - a mechanic uses a chain and bloc pulley to lift a 875-kg engine 4.0 m ...
physics - motor A lift a steel bar 5000N upward at a constant 2m/s. motor B lift...
Physics - A mechanic uses a chain and block to lift a 875-kg engine 4.00 m to ...

Search
Members