When and where will the collision occur in a one lane tunnel?

  • Thread starter Thread starter steph35
  • Start date Start date
  • Tags Tags
    Collision Time
AI Thread Summary
To determine the collision time and distance in a one-lane tunnel, Sue, driving at 33 m/s, notices a van 175 m ahead moving at 5.40 m/s. After applying brakes with an acceleration of -2.00 m/s², the problem requires calculating when and where the collision occurs. The relevant equations of motion must be used to solve for these variables. Forum policy emphasizes that users should present their attempts and the equations they plan to use before seeking assistance. This ensures a more productive discussion and helps others follow the problem-solving process.
steph35
Messages
11
Reaction score
0
Finding a collision time...

Homework Statement


Sue, driving at 33 m/s enter a one lane tunnel. She then observes a slow moving van 175 m ahead traveling with velocity 5.40 m/s. Sue applies here brakes but can accelerate at only -2.00m/s^2.


Homework Equations


Determine how far into the tunnel and at what time the collision occurs.

The Attempt at a Solution

 
Physics news on Phys.org
Hello,

FYI, it's forum policy that you show the relevant equations and, more importantly, show your attempt at solving the problem, before you can get help with it.

See item #1 here:
https://www.physicsforums.com/showthread.php?t=94379
 

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

Velocity, acceleration, collision
Replies
20
Views
3K
Solve Collision Question: Will Sue's Car Hit the Van?
Replies
1
Views
2K
A really tough physics math problem that I am in major need of help with
Replies
2
Views
1K
Help with question on motion: Avoiding a rear-end collision
Replies
6
Views
3K
Two particles, constant acceleration, when do they collide?
Replies
5
Views
6K
Collision in a One Lane Tunnel: How to Calculate Distance and Time?
Replies
11
Views
3K
Will Speedy Sue Collide with the Van in the Tunnel?
Replies
3
Views
8K
Avoid Car Crash - Algebra Based
Replies
4
Views
6K
What Do You Need to Understand About Kinematics to Solve Collision Problems?
Replies
3
Views
3K
Collision Prediction: Speedy Sue vs. Slow-Moving Van in a Wet Tunnel
Replies
3
Views
3K

Hot Threads

Recent Insights

Back
Top