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3 March, 05:32

A pinball bangs against a bumper, giving the ball a speed of 4. 5 m/s. If the ball has a mass of 50.0 g, what is the ball's kinetic energy in joules?

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  1. 3 March, 05:46
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    K. E = 0.5 j

    Explanation:

    Given dа ta:

    Mass of ball = 50 g (50/1000 = 0.05 kg)

    Speed of ball = 4.5 m/s

    K. E of ball = ?

    Solution:

    Formula:

    K. E = 1/2 m. v²

    Now we will put the values in formula

    K. E = 1/2 (0.05 kg) (4.5 m/s) ²

    K. E = 1/2 (0.05 kg) 20.25 m²/s²

    K. E = 1/2 (1.0 kg. m²/s²)

    K. E = 0.5 kg. m²/s²

    j = kg. m²/s²

    K. E = 0.5 j
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