Henry can lift a 200 N load 20 m up a ladder in 40 s. Ricardo can lift twice the load up one-half the distance in the same amount of time.

Which comparison between Ricardo and Henry is correct?

A. Ricardo exerted a greater force, did the same amount of work, and had the same power output as Henry.

B. Ricardo exerted a greater force, did the same amount of work, and had a greater power output than Henry.

C. Ricardo exerted a greater force, did less work, and had a lower power output than Henry.

D.Ricardo exerted a smaller force, did more work, and had the same power output as Henry.

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22monroe 22monroe · Answer 1 · 2018-12-04T14:21:51+01:00

your answer will be letter (A Ricardo exerted a great force, did the same amount of work, and had the same power output as Henry.

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ariston ariston · Answer 2 · 2019-05-21T13:17:47+02:00

Answer:

A. Ricardo exerted a greater force, did the same amount of work, and had the same power output as Henry.

Explanation:

Word done is the product of force and displacement. Power is the rate change of energy consumed.

Henry applied a force of 200 N lift the load up a distance of 20 m in 40 s.

Work done by Henry, [tex] W = mgh= 200 \times 20 = 4000 J[/tex]

Power output, [tex] P =\frac{W}{t}=\frac{4000}{40}=100 W[/tex]

Ricardo applied a force of 400 N lift the load up a distance of 10 m in 40 s.

Work done by Henry, [tex] W = mgh= 400 \times 10 = 4000 J[/tex]

Power output, [tex] P =\frac{W}{t}=\frac{4000}{40}=100 W[/tex]

Thus, the word done and power output by both Henry and Ricardo are equal but the force exerted by Ricardo is greater.