STANDARD Physics Work Done by a Constant Force MCQ Question with Solution

A body constrained to move along y-axis is subjected to a constant force F = -î + 2ĵ + 3k̂ N. The work done by this force in moving the body a distance of 4 m along y-axis is

A

4 J

B

8 J

C

12 J

D

24 J

Correct Answer

Option B

Detailed Explanation

Here, F = -î + 2ĵ + 3k̂ N. As the body moves a distance of 4 m along y-axis, d = 4ĵ m. Work done by the given force is W = F·d = (-î + 2ĵ + 3k̂ N)·(4ĵ m) = 8 J.

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