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27 January, 03:19

A ping-pong ball weighs 0.025 N. The ball is placed inside a cup that sits on top of a vertical spring. If the spring is compressed 0.055 m and released, the maximum height above the compressed position that the ball reaches is 2.84 m. Neglect air resistance and determine the spring constant.

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  1. 27 January, 06:10
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    The energy stored in the spring is used to throw the ball upwards. Let the height reached be h

    stored energy of spring = 1/2 k y², k is spring constant and y is compression created in the spring

    stored energy of spring = potential energy of the ball

    1/2 k y² = mgh, m is mass of the ball, h is height attained by ball

    .5 k x. 055² =.025 x 2.84

    .0015125 k =.071

    k =.071 /.0015125

    = 46.9 N / m.
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