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

http://img4.imageshack.us/img4/1116/hammery.jpg [Broken]

A block is placed under the head of the claw hammer to aid in removing the nail. Assuming that the hammer will not slip at point A...

1) What is the tension in the nail rounded to the nearest newton

2) The magnitude of the force exerted by the hammer at A rounded to the nearest Newton

3) The direction of the force exterted by the hammer on the block at A rounded to the nearest degree.

2. Relevant equations

The three equilibrium equations

Sum of x forces = 0

Sum of y forces = 0

3. The attempt at a solution

I'm pretty sure the angle is irrelevant in 1 - It's simply finding the moments around A

ΣMA = -200*0.211 + T*(0.05) = 0

which got me an answer of 844N

for part 2) trying to draw a free body diagram (including the downward force of the nail) but I'm not sure if I'm calculating anything quite correctly

http://img854.imageshack.us/img854/1264/hammer2.jpg [Broken]

ΣFx= (200*cos 24)*(0.211) + something = 0

ΣFy = -844*0.05 + (200*sin24) ? = 0

maybe? but probably not - I'm stabbing numbers in the dark. I know the answer should be around 44kN

part 3) isn't the angle just the angle of the pull in the negative direction? (so -66 - I could be wrong, getting help in part 2 will help part 3 I'm sure.)

Any help appreciated :shy:

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# Homework Help: (Statics)Hammer and nail force and tension

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