Determine Initial Velocity of Projectile with Ballistic Pendulum

AI Thread Summary
The discussion focuses on determining the initial velocity of a projectile using a ballistic pendulum setup. The pendulum has a mass of 2.50 kg, and the projectile has a mass of 0.010 kg, with the pendulum reaching a height of 0.65 m after the collision. A participant initially proposed an initial velocity of 3.6 m/s for the projectile but was informed that this value is incorrect. The correct approach involves using conservation of momentum rather than conservation of energy, as the latter does not apply in this scenario. The conversation emphasizes the importance of applying the right physical principles to solve the problem accurately.
uvburgos
Messages
4
Reaction score
0
The ballistic pendulum is a block with the mass 2.50kg suspended on a cable, the projectile has a mass of 0.010kg and is shouted with the initial velocity, after the collision the pendulum reach the height of h=0.65 m/s. Determine the initial velocity of the projectile.
 
Physics news on Phys.org
Hi uvburgos and welcome to PF,

What are your thoughts on the question? Which concepts are involved? Have your read your class notes on the concepts involved?
 
I do have the answer just need verify is my answer is correct (Vi=3.6m/s)
 
uvburgos said:
I do have the answer just need verify is my answer is correct (Vi=3.6m/s)
No, I'm afraid your answer is incorrect.

Reality check: Does 3.6 m/s seem like a realistic velocity for a bullet?
 
I forget to write at the end to ignore the friction
 
uvburgos said:
I forget to write at the end to ignore the friction
This doesn't change the answer. Your solution is still incorrect, conservation of energy does not apply here. You must you conservation of momentum.
 

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

Simulating a Rotary Inverted Pendulum in Python
Replies
15
Views
1K
Calculate the New Velocity and the Velocity of a Pendulum Mass
Replies
1
Views
1K
Linear momentum problem (ballistic pendulum)
Replies
2
Views
4K
Is the Ballistic Pendulum a Conservative Process?
Replies
9
Views
9K
How Does Trigonometry Determine the Height in a Ballistic Pendulum?
Replies
2
Views
5K
Conservation of Energy Problem -- bullet fired into a ballistic pendulum
Replies
7
Views
6K
I On whether the motion of a Foucault pendulum bob is comparable to ballistics
Replies
10
Views
2K
Ballistic Pendulum initial velocity of bullet
Replies
2
Views
3K
How Is Momentum Conserved in a Bullet and Ballistic Pendulum Collision?
Replies
3
Views
2K
Finding Velocity and Force of a projectile
Replies
19
Views
3K

Hot Threads

Recent Insights

Back
Top