what is Power? define its SI unit also. P=F×V? calculate power of a body of mass 10kg acceleration with 10m/s^2 acquires a velocity of 5m/s
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Hey mate,
Power is the rate of doing work...
P= W/t= J/s= W
Look...
Work done = force × displacement
W= F× S
And,
Power P= W/t = F× S/t
But, S/t = V
Thus, F×V =P
Given,
Mass m= 10kg
Velocity= 5m/s
Work done = 1/2mv²
1/2× 10× 5×5
= 125J
Time t= acceleration/Velocity = 2s
Thus,
Power P= 125/2= 62.5 W
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