A 28 kg rock falls freely near the surface of the Earth. Approximately how much gravitational force is exerted by the Earth on the rock? A.

Question

A 28 kg rock falls freely near the surface of the Earth. Approximately how much gravitational force is exerted by the Earth on the rock? A. 2.8 N B. 280 N C. 28 N D. 2,800 N

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Yến Oanh 4 years 2021-08-18T17:28:46+00:00 1 Answers 14 views 0

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  1. quangkhai
    0
    2021-08-18T17:30:09+00:00
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    Answer :Force is exerted by the Earth on the rock is 280 N .

    Given :

    Mass of rock falling falling , m = 28 kg .

    Acceleration due to gravity , g=10\ m/s^2 .

    We need to find the force exerted by the earth on the rock .

    Let force exerted be F .

    Now , we know by Newton’s Law Of Motion .

    F = ma     …….( 1 )

    Here , m is  mass and a is acceleration in this case it is g=10\ m/s^2 .

    Putting all these value in equation( 1 ) we get ,

    F=28\times 10\\\\F=280\ N

    Therefore, this is the required solution .

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