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22 November, 03:44

A (n) 10.7 g bullet is shot into a (n) 4588 g wooden block standing on a frictionless surface. The block, with the bullet in it, acquires a speed of 1.74 m/s. Calculate the speed of the bullet before striking the block. Answer in units of m/s

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  1. 22 November, 04:51
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    v = 747.83 m/s

    Explanation:

    given,

    mass of bullet, m = 10.7 g

    = 0.0107 Kg

    mass of the wooden plank, M = 4588 g = 4.588 Kg

    speed of the block and the bullet together, V = 1.74 m/s

    initial speed of the plank = 0 m/s

    using conservation of momentum

    m v + M u = (M + m) V

    0.0107 x v + 0 = (4.588 + 0.0107) x 1.74

    0.0107 v = 8

    v = 747.83 m/s

    now, speed of the bullet is equal to 747.83 m/s.
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