A hockey puck has a mass of 0.107 kg and is at rest. A hockey player makes a shot, exerting a constant force of 28.0 N on the puck for 0.16

Question

A hockey puck has a mass of 0.107 kg and is at rest. A hockey player makes a shot, exerting a constant force of 28.0 N on the puck for 0.16 s. With what speed does it head toward the goal

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Gia Bảo 4 years 2021-08-26T19:43:22+00:00 1 Answers 18 views 0

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  1. hongcuc2
    0
    2021-08-26T19:44:49+00:00
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    Answer:

    The speed does it head toward the goal = 41.87 \frac{m}{s}

    Explanation:

    Mass = 0.107 kg

    Initial velocity ( u ) = 0

    Force (F) = 28 N

    Time = 0.16 sec

    From newton’s second law,  Force  = mass × acceleration

    ⇒  F = m × a

    ⇒  28 = 0.107 × a

    ⇒  a = 261.7 \frac{m}{s^{2} } ——— (1)

    This is the value of acceleration.

    Final speed of the mass is calculated by the equation V = U + at

    ⇒ U = 0 because mass in in rest position at start.

    ⇒ V = a t

    Put the values of acceleration and time in above formula we get

    ⇒ V = 261.7 × 0.16

    ⇒ V = 41.87 \frac{m}{s}

    Therefore the speed does it head toward the goal = 41.87 \frac{m}{s}

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