A toy uses a spring to shoot an arrow with a suction cup on the end. The toy shoots a 34.2 g arrow and gives it a speed of 5.50 m/s. If the

Question

A toy uses a spring to shoot an arrow with a suction cup on the end. The toy shoots a 34.2 g arrow and gives it a speed of 5.50 m/s. If the efficiency of the toy is 69.0%, how much elastic potential energy was stored in the spring? Show all your work.

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Nho 4 years 2021-08-03T01:12:41+00:00 1 Answers 71 views 0

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  1. Farah
    0
    2021-08-03T01:14:31+00:00
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    Explanation:

    When spring is used to shoot an arrow, the Elastic Potential Energy is converted into Kinetic Energy.

    The efficiency of Spring Toy = 69%

    According to Conservation of Energy :

    P. E. = K. E.

    NOW,

    69% of P. E. = m * v^2 / 2

    P.E. = \frac{0.0342 \times 5.5 \times 5.5}{2 \times 0.69} = 0.75J

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