#8. A block mass m=2.00kg is attached to a spring of force constant k=5.00 x 10^

Question

#8. A block mass m=2.00kg is attached to a spring of force constant k=5.00 x 10^2 N/m that lies on a horizontal frictionless surface as shown in Figure P13.8. The block is pulled to a position xi=5.00 cm to the right of equilibrium and released from rest. Find the work required to stretch the spring.

#8. A block mass m=2.00kg is attached to a spring of force constant k=5.00 x 10^2 N/m that lies on a horizontal frictionless surface as shown in Figure P13.8. The block is pulled to a position xi=5.00 cm to the right of equilibrium and released from rest. Find the work required to stretch the spring and (b) the speed the block has as it passes through equilibrium.

Explanation / Answer

Work done is turned as the potential energy of the spring = 1/2 * kx^2 W = 1/2 * 500 * 0.05^2 = 0.625 J

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