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A block with mass 0.500 kg is attached to a horizontal spring that has force constant...

A block with mass 0.500 kg is attached to a horizontal spring that has force constant 125 N/m and the block moves in simple harmonic motion on a horizontal frictionless surface. when the block is at x=-0.300 m, its speed is v=+4.00 m/s.

a) what is the amplitude of the motion?

b) what is the speed of the block when it is at x=-0.100 m?

Can you right of the steps on how to solve it, thank you!

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