Ballistic pendulum problem ( please)

AI Thread Summary
To solve the ballistic pendulum problem, first, calculate the potential energy gained by the block at its highest point, using the height of 8.74 cm. This potential energy equals the kinetic energy imparted to the block by the bullet's momentum change. The momentum conservation principle can then be applied to find the bullet's velocity after passing through the block. The initial velocity of the bullet and the block's mass are key factors in determining the final velocity of the bullet. Understanding these concepts will help in solving the problem effectively.
hibachi7
Messages
1
Reaction score
0

Homework Statement


A 8.15- g bullet from a 9-mm pistol has a velocity of 371.0 m/s. It strikes the 0.785- kg block of a ballistic pendulum and passes completely through the block. If the block rises through a distance h = 8.74 cm, what was the velocity of the bullet as it emerged from the block?


please, I'm having an extremely hard time figuring out how to even get started on this problem. my book does not help too much and my teacher is about 120 years old (J/k) thanks in advance
 
Physics news on Phys.org
the change in momentum of the bullet passes on to the block, which enables it to rise to the given height. now, i hope u can start off!
 

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

Linear momentum problem (ballistic pendulum)
Replies
2
Views
4K
Conservation of Energy Problem -- bullet fired into a ballistic pendulum
Replies
7
Views
6K
How Fast Was the Bullet After Passing Through the Ballistic Pendulum?
Replies
1
Views
5K
How Is Momentum Conserved in a Bullet and Ballistic Pendulum Collision?
Replies
3
Views
2K
Understand Momentum & Energy Conservation in Ballistic Pendulum Problems
Replies
1
Views
2K
Ballistic Pendulum kinetic energy
Replies
8
Views
18K
Ballistic Pendulum Problem: Determining Speeds of Bullet and Block
Replies
3
Views
9K
Ballistics pendulum on steroids
Replies
1
Views
3K
Calculate Swing Length of Ballistic Pendulum | 25-gm Bullet at 300m/sec
Replies
4
Views
3K
Ballistic Pendulum: Bullet Impact at 500m/s
Replies
4
Views
3K

Hot Threads

Recent Insights

Back
Top