STANDARD Physics Work Done by a Force MCQ Question
A particle acted upon by constant forces 4î + ĵ - 3k̂ and 3î + ĵ - k̂ is displaced from the point î + 2ĵ + 3k̂ to point 5î + 4ĵ + k̂. The total work done by the forces in SI unit is
20
40
50
30
Correct Answer
Detailed Explanation
The work done by the forces is calculated using the formula W = (F₁ + F₂) · r, where r is the displacement vector. The displacement vector is (5î + 4ĵ + k̂) - (î + 2ĵ + 3k̂) = 4î + 2ĵ - 2k̂. The work done is 40 J.
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