Question

write an expression of power in terms of velocity

Answer 1

Answer:

• Often it is convenient to calculate the average power. In the straightforward cases where a constant force moves an object at constant velocity, the power is just P = Fv. ... The standard unit for power is the watt (abbreviated W) which is a joule per second.

Answer 2

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Power may be defined as the rate of doing work or the rate of using energy. These two definitions are equivalent since one unit of energy must be used to do one unit of work.

We know that ,

Power = $\frac {Work}{Time}$

As we know that,

Work = F × S

Power = $\frac {F × S}{t}$

Power = Force × Velocity

Here F is the force,

S is displacement,

t is time taken