(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A technician uses a hammer to force a nail into a wooden beam.

The hammer has a mass of 0.40kg.

It has a speed of 5.0 m/s just before it hits the nail.

After raising the hammer to a height of 0.75m, how much work does the technician do in hitting the nail with the hammer?

2. Relevant equations

I also had to work out two parts before hand -

1. The kinetic energy just before it hits the nail - which was 5J using [KE=0.5mv^2]

2. The GPE at a height of 0.75m - which was 3J using [GPE=mgh]

3. The attempt at a solution

I got this last part wrong however, I tried using the formula [W=Fs], so 0.75 * 4 = 3. And got it wrong.

Thanks in advance

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# Homework Help: Question on work and forces

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