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26 February, 03:52

2. A can filled with sand has a mass of 0.65kg is swung overhead in a horizontal circle of radius 0.70m at a constant rate of 2.5 revolutions per second. Find the angular momentum of the rock.

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  1. 26 February, 03:56
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    Answer;

    ≈ 5 Kgm²/sec

    Explanation;

    Angular momentum is given by the formula

    L = Iω, where I is the moment of inertia and ω is the angular speed.

    I = mr², where m is the mass and r is the radius

    = 0.65 * 0.7²

    = 0.3185

    Angular speed, ω = v/r

    = (2 * 3.142 * r * 2.5) r

    = 15.71

    Therefore;

    Angular momentum = Iω

    = 0.3185 * 15.71

    = 5.003635

    ≈ 5 Kgm²/sec
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