A body of mass 10 kg is moved parallel to the ground, through a distance of 2 m. The work done against gravitational force is _.
Correct answer: A. Zero
- A. Zero
- B. 196 J
- C. -196 J
- D. 48 J
Explanation
Option A is correct since gravitational force only works perpendicular to the ground, so no work is done against gravitational force. Options B, C, and D are incorrect since no work can be done against gravitational force.
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About Work
Work is done when a force produces displacement, with its value determined by the component of force along the displacement. The topic covers positive, negative and zero work, work by variable forces from force-displacement graphs, and the connection between net work and change in kinetic energy.
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