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30 December, 14:59

A 2-kg rock is thrown upward with a force of 150 N at a location where the local gravitational acceleration is 9.79 m/s2. Determine the acceleration of the rock, in m/s2.

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  1. 30 December, 15:23
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    65.2 m/s²

    Explanation:

    F = magnitude of the force applied in upward direction on rock = 150 N

    m = mass of the rock = 2 kg

    g = gravitational acceleration = 9.79 m/s²

    a = acceleration of the rock

    Taking upward direction as positive, force equation for the motion of rock is given as

    F - mg = ma

    Inserting the values

    150 - (2) (9.8) = 2 a

    a = 65.2 m/s²
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