Power is the rate of work that is done per time. Work is calculated from the product of force and the displacement. So, by using the definition of power and work, we can relate power with force, displacement and the time. We do as follows:
Power = Work / time
Power = Force x displacement / time
Power = 21 N (9 m) / 3 s
Power = 63 J /s = 63 W
Answer:
Potential Difference between ends (Voltage)
Temperature.
Material of wire.
Length of wire.
Area of Cross- section.
Explanation:
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I believe this is right but double check to make sure :)
A.draw in the forces .Use the scale 1cm =10n of force