anonymous
  • anonymous
The 4 kg head of a sledgehammer is moving at 6 m/s when it strikes a spike driving it into a log. The duration of the impact is 2 ms. Find the time average of the impact force.
Physics
chestercat
  • chestercat
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UnkleRhaukus
  • UnkleRhaukus
impulse is the change in momentum
anonymous
  • anonymous
Yes, but where does impulse come here?
anonymous
  • anonymous
It's basic newton's second law. \[F=\frac{m(v-u)}{t}\] You know m, v (=0), u and t.

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anonymous
  • anonymous
What do you mean by time average of impact force?
anonymous
  • anonymous
@rajathsbhat you have given the way to find the force, but that is not what they are asking here.
anonymous
  • anonymous
hmm i just noticed that.....i'm not too sure of what means though...
anonymous
  • anonymous
*what it means
anonymous
  • anonymous
Please help, this sum has been frustrating me for hours .... don't even know what it means ...
anonymous
  • anonymous
perhaps it's simply F/t?

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