What is the force exerted on a bullet leaving a rifle?

  • Thread starter Thread starter physicsquest
  • Start date Start date
  • Tags Tags
    Bullet Force
AI Thread Summary
To determine the force exerted on a bullet leaving a rifle, the bullet's mass is 5.0g and its exit speed is 320 m/s. The barrel length is 0.82 m, and the relevant equation is ΣF = ma. The work-energy theorem can simplify the calculation, where work done equals the change in kinetic energy. By applying these principles, the force can be calculated based on the bullet's acceleration and the distance traveled in the barrel.
physicsquest
Messages
15
Reaction score
0

Homework Statement


A 5.0g bullet leaves the muzzle of a rifle with a speed of 320 m/s. What force (assumed constant) is exerted on the bullet while it is traveling down the 0.82 m long barrel of the rifle?


Homework Equations


\SigmaF=ma


The Attempt at a Solution


 
Physics news on Phys.org
It might be simpler to use the work-energy theorem here:

W=\Delta E_k
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Physics rifle problem -- Forces and acceleration of the bullet
Replies
1
Views
2K
Find the average force exerted on a bullet by a rifle
Replies
1
Views
3K
How Much Force Accelerates a Bullet in a Rifle?
Replies
3
Views
2K
Calculating Average Net Force Exerted on a 15-g Bullet Fired from a Rifle
Replies
14
Views
3K
Calculating Friction & Time for a Bullet Penetrating Rubber
Replies
2
Views
1K
Speed of a Bullet: Hunter's Rifle & Duck Flight
Replies
9
Views
3K
Calculating Momentum of Propellant Gases in a Rifle Recoil
Replies
5
Views
3K
Find the force exerted on a bullet as it travels through the barrel
Replies
1
Views
7K
Calculate Force (N) on Bullet in 0.8m Rifle Barrel
Replies
1
Views
2K
How Is Acceleration Calculated for a Bullet in a Rifle Barrel?
Replies
1
Views
2K

Hot Threads

Recent Insights

Back
Top