Question

A 30.0 kg object has an initial velocity of 7.00 m/s and a final velocity of 10.0 m/s. The work done on the object is ___________ J. (Report the answer to three significant figures.)

Answer 1

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Answer 2

The work done on the object during this motion is 765 J.

The given parameters;

• mass of the object, m = 30 kg
• initial velocity of the object, u = 7 m/s
• final velocity of the object, v = 10 m/s

The work done on the object is determined by applying work-energy theorem.

W = ΔK.E

W = ΔK.E = ¹/₂m(v² - u²)

W = ¹/₂ x 30(10² - 7²)

W = 765 J

Thus, the work done on the object during this motion is 765 J.

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