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24 May, 21:33

An object with a mass of 450. grams is dropped off a 706m cliff. What is the velocity of the rock right before it impacts the ground.

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  1. 24 May, 21:55
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    Correct answer: V = 118.83 m/s

    Explanation:

    Given:

    m = 450 g = 0.45 kg mass of the object

    H = 706 m the height of the cliff from which the object was dropped

    V = ? final velocity before object impact the ground

    This movement is a free fall.

    The velocity is calculated using the following formula:

    V² = 2 · g · H in calculating we will use g = 10 m/s²

    V² = 2 · 10 · 706 = 14,120 ⇒ V = √14,120 = 118.83 m/s

    V = 118.83 m/s

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