A weight lifter lifts $240 k g$ from the ground to a height of $2.5 m$ in $3$ second his average power is:

$1960 W$

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$19.6 W$

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$1.96 W$

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$196 W$

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Solution

The correct option is A
$1960 W$

Step 1. Given data,
$M a s s = 240 k g h e i g h t = 2.5 m T i m e = 3 s$
Assuming $g = 9.8 m / s^{2}$
Step 2. Finding average power
Average power $= \frac{T o t a l e n e r g y c o n s u m e d}{t o t a l t i m e t a k e n}$
average power $= \frac{m \times g \times h}{t}$
average power $= \frac{240 k g \times 9.8 m / s^{2} \times 2.5}{3 s e c}$
average power $= \frac{5880 J}{3 s}$
average power $= 1960 W$
Thus, a weight lifter lifts $240 k g$ from the ground to a height of $2.5 m$ in $3$ second his average power is $1960 W .$ Hence option ‘a’ is correct.

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A weight lifter lifts 240kg from the ground to a height of 2.5m in 3 second his average power is:

A weight lifter lifts $240 k g$ from the ground to a height of $2.5 m$ in $3$ second his average power is: