A weight lifter lifts a 345 N set of weights from ground level to a position over his head, a vertical distance of 1.89 m. How m

Question

3 years ago

13

uch work does the weight lifter do, assuming he moves the weights at constant speed?

1 answer:

Pavlova-9 [17] · Answer 1 · 2022-03-27T18:29:36+03:00

3 0

Answer:652.05 J

Explanation:

Given

Weight of lifter $W=345 N$

vertical distance move $h=1.89 m$

Work done in lifting the weight is equal change in Potential Energy of weight

Change in Potential Energy $=m g h$

$\Delta PE=345 \times 1.89=652.05 J$

therefore work done is equal to $652.05 J$