physicsballer2
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Potential Energy and Work done to lift object distance "h"
The amount of energy needed to power a 0.10 kW bulb for 12 minutes would be sufficient to lift a 1 kg object how high?
Power = work/time
PE = mgh
First I converted kw to watts which is 100 watts. Then converted minutes to seconds = 720 seconds.
I found the work done by the lightbulb:
power = work/time
100 = w/720
w = 72,000 joules
Then I plugged that into potential energy(not sure if you can do that), I solved for h using 9.8 for gravity and 1 kg for mass
PE = mgh
72,000 = (1)(9.8)h
h = 7347 meters
That number seems a bit high
The amount of energy needed to power a 0.10 kW bulb for 12 minutes would be sufficient to lift a 1 kg object how high?
Power = work/time
PE = mgh
First I converted kw to watts which is 100 watts. Then converted minutes to seconds = 720 seconds.
I found the work done by the lightbulb:
power = work/time
100 = w/720
w = 72,000 joules
Then I plugged that into potential energy(not sure if you can do that), I solved for h using 9.8 for gravity and 1 kg for mass
PE = mgh
72,000 = (1)(9.8)h
h = 7347 meters
That number seems a bit high