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A 150 kg car engine develops Power of 500 W for each kg. What Force does it exert in moving the car at a speed of 20 ms?
IshanRocks
Power = Work ÷ time
Work = Force * distance
Power = Force * distance ÷ time
Distance ÷ time = velocity
Power = Force * velocity
This equation is used when you know the power and velocity.
500 = F * 20
F = 500/20 = 25 N
Wiki User
∙ 9y ago
Wiki User
∙ 9y agoPW = power = ( 500 W/kg ) ( 150 kg ) ( 1.0 N - m / W - s ) = 75 x 10^3 N - m /s
PW = ( Force ) ( Speed ) = ( F ) ( Sp )
F = ( PW ) / ( Sp ) = ( 75 x 10^3 N - m/ s ) / ( 20 m/s ) = 3750 N <-------
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