A block of mass m = 5.70 kg is attached to a light spring and slides on a rough horizontal surface as shown in the figure below. Thespring constant is k = 90.0 N/m and the coefficient of kinetic friction between the block and the surface is u, = 0.150 . The block isreleased from rest when the spring is stretched the distance x; = 22.00 cm .kx= 0x= X;(a) Find the work done by the friction force from the start of the motion to the moment when the block passes the equilibrium positionX = 0.W =J(b) Find the speed of the ball when it passes the equilibrium position x = 0.V =m/s(c) Find the position of the block Xf, at which it will stop.Xf =cm

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