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Rotational kinetic energy of a disc or solid cylinder at the foot of an incline of height h

The same question, asked 2 times: 4 May 2023 S2, 20 Apr 2025 S2. Every wording below, oldest first.

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  1. Question 1

    4 May 2023 S2

    32
    A solid cylinder of mass 'M' and radius 'R' rolls down an inclined plane of height 'h'. When it reaches the foot of the plane, its rotational kinetic energy is (g=g = acceleration due to gravity)

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  2. Question 2

    20 Apr 2025 S2

    40
    A disc of mass ' mm ' and radius ' rr ' rolls down an inclined plane of height ' hh '. When it reaches the bottom of the plane, its rotational kinetic energy is ( g=g = acceleration due to gravity)

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