Solving a Motor Lift Problem: Find Out What You Need to Do

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To determine how long it will take a 1780 W motor to lift a 252 kg piano to a height of 15.8 m, one must calculate the work done against gravity. The formula P = W / t is essential, where power (P) is the motor's output, work (W) is the force multiplied by distance, and time (t) is what needs to be solved. The work can be calculated using the weight of the piano and the height it needs to be lifted. Once the work is known, rearranging the formula allows for the calculation of time. Understanding these principles will help solve the motor lift problem effectively.
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I can't solve this problem, please help me.

How long will it take a 1780 W motor to lift a 252 kg piano to a sixth-story window 15.8 m above?
what do i have to do?
 
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Liatana said:
I can't solve this problem, please help me.

How long will it take a 1780 W motor to lift a 252 kg piano to a sixth-story window 15.8 m above?
what do i have to do?

What is the definition of power? Write it down and I'm sure you'll make progress.

Edit: you may find this useful: http://www.glenbrook.k12.il.us/gbssci/phys/CLass/energy/u5l1e.html" .
 
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you mean p=W/t?
 
Liatana said:
you mean p=W/t?

Yes, I mean P = W / t. Now, what does the work equal?
 
yes, i find it thanks
 

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