A 1.0kg ball is thrown into the air with an initial velocity of 30m/s. How much potential energy does the ball have when it reached the top

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A 1.0kg ball is thrown into the air with an initial velocity of 30m/s. How much potential energy does the ball have when it reached the top of its ascent?

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Thu Thủy 2 months 2021-07-24T14:46:22+00:00 1 Answers 1 views 0

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    2021-07-24T14:47:56+00:00

    Answer: 450J

    Explanation:

    Mass of ball = 1.0kg

    kinetic energy = ?

    velocity of the ball = 30m/s

    Kinetic energy is the energy possessed by a moving object. It is measured in joules, and depends on the mass (m) of the object and the velocity (v) by which it moves

    i.e K.E = 1/2mv²

    KE = 1/2 x 1.0kg x (30m/s)^2

    KE = 0.5 x 1.0 x 900

    KE = 450J

    (Recall that kinetic energy is equal to potential energy at the top of its ascent)

    So, if KE = 450J; PE = 450J

    Thus, the potential energy of the ball is 450 joules.

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