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Impulse of a time-varying force (area under the force-time graph)

This type of question, asked 2 times: 19 Apr 2025 S2, 14 May 2026 S1. All 2 questions below, oldest first.

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  1. Question 1

    19 Apr 2025 S2

    23
    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

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  2. Question 2

    14 May 2026 S1

    104
    A bullet is fired from a gun. The force on the bullet is F=(600−2×105t)F = (600 - 2 \times 10^5t) N where tt is in second. The force on the bullet becomes zero as soon as it leaves the barrel. The average impulse imparted to the bullet is

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