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1 July, 05:58

A 10kg rocket is traveling at 80 m/s when the booster engine applies a constant forward force of 60 N for 3.0 seconds. What impulse

does the booster engine supply? What is the resulting velocity of the rocket?

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  1. 1 July, 08:09
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    Impulse = 90

    Resulting Velocity = 89

    Explanation:

    Use F * change in time = m * change in velocity.

    For the first part of the question, the left side of the equation is the impulse. Plug it in.

    60 * (3.0 - 0) = 90.

    For the second half. we use all parts of the equation. I'm gonna use vf for the final velocity.

    60 * (3.0 - 0) = 10 * (vf - 80). Simplify.

    90 = 10vf - 800. Simplify again.

    890 = 10vf. Divide to simplify and get the answer.

    The resulting velocity is 89.
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