STANDARD Physics Impulse and Momentum MCQ Question
The position-time graph of a body of mass 2 kg is as shown in figure. What is the impulse on the body at t = 4 s?
2/3 kg m s⁻¹
-2/3 kg m s⁻¹
3/2 kg m s⁻¹
-3/2 kg m s⁻¹
Correct Answer
Detailed Explanation
At t = 4 s, the body has constant velocity u = 3/4 m s⁻¹. After t = 4 s, the body is at rest i.e., v = 0. Impulse = m(v - u) = 2 kg (0 - 3/4 m s⁻¹) = -3/2 kg m s⁻¹.
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