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Statement of a problem № 10218

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A 5 kg sphere is dropped from a height y = 2 m to test newly designed spring floors used in gymnastics. The mass of the floor section is 10 kg, and the effective stiffness of the floor is k = 120kN/m. Knowing that the coefficient of restitution between the ball and the platform is 0.6, Determine (a) The height h reached by the sphere after rebound, (b) The maximum force in the springs.




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