Prove that, P= F× V
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Power P is work over time: W/t or F v. If the force is constant the velocity is changing with time: v=v(t). ... Can we have a situation where v is constant and F is constant too, i.e. the instantaneous power is constant? That seems strange, since if the force is constant the velocity
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Power: The rate of doing work or the amount of energy transferred is called power. The unit of power is joule per second .
The physical quantity obtained by dot product of force and velocity is Power. It is Scalar quantity.
Proof:
F.v = F.d/t
Which implies,
W/t = P
Where,
F - Force
v - Velocity
p=F.v
As power has no direction and is one dimensional measurement. So, it is regarded as a scalar quantity.
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