Question

An oscillating block-spring system has a mechanical energy of 5.1 J, an amplitude of 0.81 m, and a maximum speed 1.6 m/s. Find the spring constant k of the spring.

What is the mass of the block?

What is the frequency of oscillation?
5.1=1/2kx<2
5.1=1/2k.0.81.0.81 now you can solve

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