MHT CET · Physics · Center of Mass Momentum and Collision
Force is applied to a body of mass 3 kg at rest on a frictionless horizontal surface as shown in the force against time (F - t) graph. The speed of the body after 1 s is
- A \(8 \mathrm{~m} / \mathrm{s}\)
- B \(6 \mathrm{~m} / \mathrm{s}\)
- C \(4 \mathrm{~m} / \mathrm{s}\)
- D \(2 \mathrm{~m} / \mathrm{s}\)
Answer & Solution
Correct Answer
(D) \(2 \mathrm{~m} / \mathrm{s}\)
Step-by-step Solution
Detailed explanation
\(J = \text{Area under F-t graph} = \frac{1}{2} \times 1 \text{ s} \times 12 \text{ N} = 6 \text{ Ns}\) \(J = m(v_f - v_i)\)
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