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

## Related Questions

- Pysics - A small motor runs a lift that raises aload of bricks weighing 836N to ...
- 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 - a mechanic uses a chain and bloc pulley to lift a 875-kg engine 4.0 m ...
- physics - A 10kilow walts electric motor is used to raise a 400kg load of bricks...
- Physics - A mechanic uses a chain and block to lift a 875-kg engine 4.00 m to ...
- Physics - pulley - A construction crew pulls up an 87.5-kg load using a rope ...
- 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 ...

More Related Questions