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Formula for average force? 
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#1
Dec907, 04:07 PM

P: 9

In a ballistics test at the police department, Officer Rios fires a 6.0 g bullet at 350 m/s into a container that stops it in 1.8 ms. What is the average force that stops the bullet?
can anyone help me to do this? or just give me the formula? The teacher gave us the right answer and it's 1.2 x 10^3N 


#2
Dec907, 04:11 PM

Sci Advisor
HW Helper
P: 1,275

The average force is the change in momentum divided by the change in time.



#3
Dec907, 04:13 PM

P: 7

This is just an impulsemomentum theorem problem. Impulse = Change in momentum. Impulse is F*delta t (t=time of impact) and change in momentum is just final momentum  initial momentum. Good luck



#4
Dec907, 04:29 PM

P: 9

Formula for average force?
delta p= J
and J= F(delta t) so delta p=6.0g(350m/s) delta p=2100 2100/1.8=1166.6666667 is that the same thing as 1.2x10^3? 


#6
Dec907, 04:34 PM

P: 9

thank you so much guys!



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