A mass accelerates uniformily when the resultant force acting on it:
Correct answer: B. Is constant but not zero
- A. Is zero
- B. Is constant but not zero
- C. Increases uniformly with respect to time
- D. Is proportional to the displacement of the mass from a fixed point
Explanation
A mass accelerates uniformly when the resultant force acting on it is constant but not zero.
This question appeared on the ETEA MDCAT 2013 paper, which you can sit online with every answer explained.
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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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