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9 July, 06:51

A rifle is fired straight up, and the bullet leaves the rifle with an initial velocity magnitude of 724 m/s. After 5.00 s the velocity is 675 m/s. At what rate is the bullet decelerated?

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  1. 9 July, 07:36
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    v (final) = v (initial) + at

    675 = 724 + a (5.00)

    a = - 9.8 m/s^2

    negative is simply mean decelerate, therefore, the answer would be 9.8 m/s^2
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