Here's the question you clicked on:
pratu043
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.
impulse is the change in momentum
Yes, but where does impulse come here?
It's basic newton's second law. \[F=\frac{m(v-u)}{t}\] You know m, v (=0), u and t.
What do you mean by time average of impact force?
@rajathsbhat you have given the way to find the force, but that is not what they are asking here.
hmm i just noticed that.....i'm not too sure of what means though...
Please help, this sum has been frustrating me for hours .... don't even know what it means ...
perhaps it's simply F/t?