Physicsmedium · Past Paper
A force of 10 N acts on a body of mass 2 kg. If the body starts from rest, its KE after 2 seconds is:
A100 J
B50 J
C200 J
D20 J
✓ Correct Answer: A — 100 J
a = F/m = 10/2 = 5 m/s^2. v = u + at = 0 + 5*2 = 10 m/s. KE = 1/2 * 2 * 10^2 = 100 J.
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