Question

Ben and Jerry, arch rivals, decide to have a weight lifting contest during PE. Ready, set, go! Ben and Jerry both lift a 250 kg barbell 10 times over their heads. They are approximately the same height and lift the barbell the same distance in the air. It takes Ben 5 seconds to complete 10 lifts; it takes Jerry 25 seconds to complete his 10 lifts. Which statement is MOST accurate regarding the weightlifting contest? A) Ben did more work than Jerry. B) Ben has more power than Jerry. C) Ben and Jerry have the same power. D) Ben does more work and is more powerful than Jerry.

Answer 1

The answer is B. Your welcome.

B    ) STILL CHILL

Answer 2

Answer:

B) Ben has more power than Jerry.

Explanation:

Here work done to lift the mass to the certain height is given as

$W = mgh$

now given that Ben and Jerry both lift the mass to the same height 10 times

so here work done by Ben and Jerry must be same.

now we know that power is defined as rate of work done

$P = \frac{W}{t}$

now we know from above formula that it took less time by Ben as he lift the mass 10 times in 5 seconds while Jerry took 25 seconds to lift the mass 10 times.

So here power by Ben will be more than Jerry as is took lesser time to complete the task of 10 times lift of mass