Thread: Simple Power problem!

1. Simple Power problem!

I know this is a simple problem, but i do not know how to approach it.

How long would it take a crane motor to lift a 1000kg container 5m from the ground to a storage platform if its power is:
a) 10 kilowatts
b) 20 kilowatts
I tried finding the power exerted by the object but that got me no where. So how do i solve this?

Thank you for your time!

2. Re: Simple Power problem!

Hey sakonpure6.

What is the relationship between potential energy and power? Recall that the potential energy at the high point will be related to the energy to take the object up to that point.

3. Re: Simple Power problem!

Originally Posted by chiro
Hey sakonpure6.

What is the relationship between potential energy and power? Recall that the potential energy at the high point will be related to the energy to take the object up to that point.
Ohhhhh, so the equation for a) would be: time= (1000kg(9.8)(5))/10,000W

4. Re: Simple Power problem!

I'm not sure of the actual equations myself, but I do know the relationship between the energies,