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23 May, 19:47

A 91 kg block is released at a 6 m height as shown. The track is frictionless. The block travels down the track, hits a spring of force constant k = 1968 N/m. The acceleration of gravity is 9.8 m/s

Determine the compression of the spring x from its equilibrium position before coming to rest momentarily. Answer in units of m.

h=6m

m=91kg

k=1968N/m

+2
Answers (1)
  1. 23 May, 20:00
    0
    Initial gravitational potential energy = final elastic potential energy

    initial gravitational potential energy = m x g x h

    = 91 x 9.8 x 6 = 5351 J

    initial gravitational potential energy = final elastic potential energy = 5351J

    final elastic potential energy = 1/2 x k x d^2 = 1/2 x 1968 x d^2 = 984 x d^2

    5351 = 984 x d^2

    d = √ (5351/984)

    d=2.33m
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