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7 August, 06:07

A 30.9 kg rocket has an engine

that creates a 790 N upward force

("thrust"). What is its acceleration?

(Don't forget its weight!)

(Unit = m/s)

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Answers (1)
  1. 7 August, 06:16
    0
    acceleration = 15.8 m/s^2

    Explanation:

    Weight of rocket which acts downward is W = mass * acceleration due to gravity

    w = 30.9 * 9.81

    W = 303.129 N

    force of 790 N acts upward and it is greater than W hence acceleration is in upward direction and is given by Newton's second law of motion as

    790 - W = mass * acceleration

    790 - 303.129 = 30.9 * acceleration

    486.871 = 30.9 * acceleration

    acceleration = 486.871 / 30.9

    acceleration = 15.756 m/s^2

    acceleration = 15.8 m/s^2
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