A particle is moving with a constant speed a long a straight line. A force is not required to:
Correct answer: D. Keep it moving with uniform velocity
- A. Increased speed
- B. Decreased the momentum
- C. Change the direction
- D. Keep it moving with uniform velocity
Explanation
According to Newton's law if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force so option D is correct
This question appeared on the ETEA MDCAT 2017 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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