A 2-kg sphere moving to the right with a velocity of 5 m/s strikes at A the surface of a 9-kg quarter cylinder which is initially at rest and in contact with a spring of constant 20 kN/m. The spring is held by cables so that it is initially compressed 50 mm. Neglecting frictions and knowing that the coefficient of restitution is 0.6, determine

(a) The velocity of the sphere immediately after impact,

(b) The maximum compressive force in the spring.

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5 m/s 45° Cable www