help A horizontal spring attached to a wall has a force constant of k = 730 N/m.

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A horizontal spring attached to a wall has a force constant of k = 730 N/m. A block of mass m = 1.60 kg is attached to the spring and rests on a horizontal, frictionless surface as in the figure below. The block is pulled to a position xi = 6.40 cm from equilibrium and released. Find the elastic potential energy stored in the spring when the block is 6.40 cm from equilibrium and when the block passes through equilibrium. x (cm) Elastic Potential Energy (J) 6.40 0 Find the speed of the block as it passes through the equilibrium point. m/s What is the speed of the block when it is at a position x/2 = 3.2 cm? m/s Why isn't the answer to part (c) half the answer to part (b)?

Explanation / Answer

a

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