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26 March, 15:45

An ice hockey puck slides along the ice at 12 m/s.?

A hockey stick delivers an impulse of 4.0 kg x m/s causing the puck to move off in the opposite direction with the same speed.

What is the mass of the puck in kg?

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  1. 26 March, 17:19
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    Since we know that ...

    I = F. ∆t

    = m. a. ∆t (the puck accelerating after the collision with the hockey sticks)

    = m. ∆v/∆t. ∆t

    = m. ∆v

    Solve for m, we get ...

    m = I / ∆v

    = 4 / 12

    = 1 / 3 kg or 0.33 kg
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