A force of 30 N acts on a body and moves it 2m in the direction of force. The work done is
Correct answer: A. 60 J
- A. 60 J
- B. 15 N
- C. 0.06 J
- D. Zero
Explanation
Work = Force x Distance x cosθ In this case, force is 30N, the distance is 2m and the force is acting in the direction of displacement (θ = 0). Cos0 = 1 Work = 30 x 2 x 1 =60J
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Vectors have magnitude and direction, unlike scalars, and are combined by head-to-tail or parallelogram methods. Work covers rectangular components, equilibrium when the resultant force is zero, the scalar product for work and projections, and the vector product for torque and cross-product direction using the right-hand rule.
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