Define watt. Express kilowatt in terms of jou | vedclass

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(C) One watt is defined as the power of an agent that performs work at the rate of $1 \, J \, s^{-1}$.$1 \, 	ext{kilowatt} = 1000 \, J \, s^{-1}$.Tot

Vedclass · Accepted Answer

$3750$

Vedclass · Answer

(C) One watt is defined as the power of an agent that performs work at the rate of $1 \, J \, s^{-1}$.$1 \, 	ext{kilowatt} = 1000 \, J \, s^{-1}$.Total power developed by the engine $= 150 \, kg 	imes 500 \, W \, kg^{-1} = 75,000 \, W = 7.5 	imes 10^4 \, W$.We know that $	ext{Power} = 	ext{Force} 	imes 	ext{Velocity}$.Therefore, $	ext{Force} = \frac{	ext{Power}}{	ext{Velocity}} = \frac{7.5 	imes 10^4 \, W}{20 \, m \, s^{-1}} = 3750 \, N$.

Define watt. Express kilowatt in terms of joule per second. $A$ $150 \, kg$ car engine develops $500 \, W$ for each $kg$. What force does it exert in moving the car at a speed of $20 \, m \, s^{-1}$ (in $N$)?

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