A bullet of mass 0.0021 kg is shot into a wooden block of mass 0.197 kg.(adsbygoogle = window.adsbygoogle || []).push({});

They rise to a final height of 0.546 m as shown. What was the initial speed (in m/s) of the bullet before it hit the block?

I figured out this one

I got another one

A 5.0 kg ball is attached to a vertical unstretched spring with k = 762 N/m and then released. What distance does the ball fall just as it momentarily comes to rest?

I use F=-kx with F=mg therefore mg=-kx from there I solve for x but I got the wrong answer. What am I wrong. Thank you

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# Homework Help: Bullet of mass physics problem

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