Physics

Question

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)

1 Answer

  • Answer:

    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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