Do I need to use trig and is the 10 centimeters an angle

  • Thread starter Thread starter Ilovmyjeep
  • Start date Start date
  • Tags Tags
    Angle Trig
AI Thread Summary
To determine the acceleration of the bullet as it passes through a 10 cm thick board, the initial speed is 400 m/s and the final speed is 300 m/s. The thickness of the board is converted to meters for calculations. The discussion emphasizes the importance of using consistent units, either MKS or cgs. A specific equation relating distance, initial velocity, final velocity, and acceleration is suggested for solving the problem. Understanding these principles is crucial for calculating the bullet's acceleration and the time taken to pass through the board.
Ilovmyjeep
Messages
1
Reaction score
0
A bullet is fired through a board 10 cm thick in such a way that the bullets line of motion is perpendicular to the face of the board. If the initial speed of the bullet is 400 m/s and it emerges from the other side with a speed of 300 m/s. what is the accelaeration of the bullet as it passes throught the board and the total time it takes to pass through the board?:rolleyes: :rolleyes: ]

]
 
Physics news on Phys.org
No, you do not, and no. 10 centimeters are 10 hundredths of a meter which is the primary metric unit of length.
 
Ilovmyjeep said:
A bullet is fired through a board 10 cm thick in such a way that the bullets line of motion is perpendicular to the face of the board. If the initial speed of the bullet is 400 m/s and it emerges from the other side with a speed of 300 m/s. what is the accelaeration of the bullet as it passes throught the board and the total time it takes to pass through the board?
As Atomos indicated, make sure units have the same basis MKS or cgs. One has distance, and velocity before and after that distance. There is a particular equation concerning that relationship.
 

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 '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 HW kinematics and sig figs
Replies
4
Views
2K
What is the acceleration of a bullet passing through a board?
Replies
3
Views
3K
Average Acceleration Question for Bullet Through Board
Replies
1
Views
2K
Is My Physics Calculation on Bullet and Block Interaction Correct?
Replies
14
Views
4K
Bullet Momentum Force: 3.15x104 N
Replies
28
Views
8K
Physics 100A Problem about firing a bullet
Replies
3
Views
4K
Shooting a bullet at an angle from a given height
Replies
1
Views
2K
Bullet conservation of momentum problem
Replies
3
Views
2K
Bullet passing through 4cm thick board
Replies
6
Views
10K
How Do You Calculate Acceleration in Physical and Ballistic Scenarios?
Replies
3
Views
5K

Hot Threads

Recent Insights

Back
Top