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.

Question

unklerhaukus · Answer

impulse is the change in momentum

anonymous · Answer

Yes, but where does impulse come here?

anonymous · Answer

It's basic newton's second law.
$$F=\frac{m(v-u)}{t}$$
You know m, v (=0), u and t.

anonymous · Answer

What do you mean by time average of impact force?

anonymous · Answer

@rajathsbhat you have given the way to find the force, but that is not what they are asking here.

anonymous · Answer

hmm i just noticed that.....i'm not too sure of what means though...

anonymous · Answer

*what it means

anonymous · Answer

Please help, this sum has  been frustrating me for hours .... don't even know what it means ...

anonymous · Answer

perhaps it's simply F/t?