STANDARD Physics Newton's Second Law MCQ Question
A constant retarding force of 50 N is applied to a body of mass 10 kg moving initially with a speed of 10 m s⁻¹. The body comes to rest after
2 s
4 s
6 s
8 s
Correct Answer
Detailed Explanation
The retarding force causes a deceleration of 5 m s⁻². Using the equation v = u + at, where v = 0, u = 10 m s⁻¹, and a = -5 m s⁻², we find t = 2 s.
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