I am having trouble with this problem:(adsbygoogle = window.adsbygoogle || []).push({});

A particle of mass 4.00 kg is attached to a spring with a force constant of 100 N/m. It is oscillating on a horizontal frictionless surface with an amplitude of 2.00 m. A 6.00-kg object is dropped vertically on top of the 4.00-kg object as it passes through its equilibrium point. The two objects stick together.

(A) By how much does the amplitude of the vibrating system change as a result of the collision.

(B) By how much does the period change?

(C)By how much does the energy change?

(D) Account for the change in energy?

This is pretty much a plug-in problem, but my main question is how to solve for the new amplitude and energy after the collision. I am going over the formulas and it seems like the amplitude is in the formula for energy and energy is part of the formula for amplitude, how can I solve for one or the other when they both change after the collision? Can someone give me a clue?

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# Harmonic Motion Help

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