A body in equilibrium must not have:
Correct answer: D. Acceleration
- A. Kinetic energy
- B. Velocity
- C. Momentum
- D. Acceleration
Explanation
For a body to be in equilibrium, it must have zero net acceleration, which is the result of all external forces canceling each other out. This ensures that the body does not change its state of motion. While kinetic energy, velocity, and momentum can exist, they must remain constant, indicating no net external force is present. Acceleration, however, signifies a change in the state of motion due to a net force, which contradicts the condition of equilibrium.
This question appeared on the ETEA MDCAT 2012 paper, which you can sit online with every answer explained.
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About Newton's Laws of Motion
Newton’s laws explain inertia, the relation between net force and acceleration, and action-reaction pairs. Questions involve free-body diagrams, balanced and unbalanced forces, F = ma, force as the rate of change of momentum, and identifying genuine third-law pairs, which act on different bodies.
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