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Centripetal force when mass, speed or radius change

This type of question, asked 2 times: May 2022 S1, 10 May 2023 S2. All 2 questions below, oldest first.

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  1. Question 1

    May 2022 S1

    50
    Two bodies of masses mm and 3m3m are rotating in horizontal circles. The speed of the body of mass mm is nn times that of the heavier body, while the centripetal force is the same for both. The value of nn is

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  2. Question 2

    10 May 2023 S2

    11
    A particle of mass 'm' performs uniform circular motion of radius 'r' with linear speed 'v' under the application of force 'F'. If 'm', 'v' and 'r' are all increased by 20%, the necessary change in force required to maintain the particle in uniform circular motion is

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