When the body moves against the force of friction on a horizontal plane, the work done by the body is:
Correct answer: A. Negative
- A. Negative
- B. Positive
- C. Zero
- D. Maximum and positive
Explanation
When the body moves against the force of friction on a horizontal plane, the work done by the body is negative. This is because the force of friction acts in the opposite direction of the body's motion. When work is negative, it means that energy is being transferred from the body to the surroundings. In this case, the energy is being dissipated as heat due to the friction.
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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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