If an object of mass 10 kg is moving with a uniform speed of 10 m/s, then the linear momentum and the kinetic energy of the object, respectively, are
- A. 100 N.s and 500 J ✓
- B. 100 N.s and 1000 J
- C. 200 N.s and 500 J
- D. 200 N.s and 1000 J
Correct Answer: A. 100 N.s and 500 J
Explanation
Linear momentum p = mv = 10 \times 10 = 100 \text{ N.s}. Kinetic energy K = \frac{1}{2}mv^2 = \frac{1}{2} \times 10 \times (10)^2 = 500 \text{ J}.
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