What is the acceleration of a bullet passing through a board?

  • Thread starter Thread starter fiziks09
  • Start date Start date
  • Tags Tags
    Dimension Motion
AI Thread Summary
To find the bullet's acceleration as it passes through a 14.0 cm thick board, the initial speed is 450 m/s and the final speed is 220 m/s. The formula v² = u² + 2as can be used, where s is the distance (converted to meters), u is the initial speed, v is the final speed, and a is the acceleration. Participants emphasize the importance of showing work in homework discussions and note that direct answers cannot be provided. The conversation highlights the need for understanding the physics principles involved in calculating acceleration.
fiziks09
Messages
28
Reaction score
0
Hello, please any help will be very much appreciated;

A bullet is fired through a board, 14.0 cm thick, with its line of motion perpendicular to the face of the board. If it enters with a speed of 450 m/s and emerges with a speed of 220 m/s, what is the bullet's acceleration as it passes through the board?
 
Physics news on Phys.org
Hi there, this belongs in the homework section.

Jared
 
Using: v2 = u2 + 2as

Where s = distance, u = initial speed, v = final speed and a = acceleration.

You know s, u and v. Plug them in and rearrange to give an answer for a.

Don't forget to convert cm to m.

We cannot give you direct answers as per the guidelines, but we can help, however in future you must show your attempt.

Jared
 
Oh thanks very much...
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Similar threads

Average Acceleration Question for Bullet Through Board
Replies
1
Views
2K
Physics HW kinematics and sig figs
Replies
4
Views
2K
Is My Physics Calculation on Bullet and Block Interaction Correct?
Replies
14
Views
4K
Physics rifle problem -- Forces and acceleration of the bullet
Replies
1
Views
2K
Physics 100A Problem about firing a bullet
Replies
3
Views
4K
What was the initial temperature of the lead bullet before it melted completely?
Replies
3
Views
1K
Bullet passing through 4cm thick board
Replies
6
Views
10K
How Does an Ideal Fluid's Velocity Change When Hitting a Vertical Board?
Replies
17
Views
3K
Velocity of bullet before hitting a pendulum
Replies
11
Views
3K
Do I need to use trig and is the 10 centimeters an angle
Replies
2
Views
2K

Hot Threads

Recent Insights

Back
Top