Help with Forces: Calculate Horizontal Stopping Force

  • Thread starter Thread starter Angeluzmaia
  • Start date Start date
  • Tags Tags
    Forces
AI Thread Summary
To calculate the horizontal stopping force of an 830 kg car traveling at 27 m/s that stops in 61 m, the relevant formulas include F = m*a and the kinematic equation a = (v^2 - v_i^2) / (2 * Δx). The user seeks clarification on the work-energy principle, specifically W = ΔK, and how it applies to their problem. Additionally, they request assistance in determining the stopping distance of the same car on a 19.9° slope while traveling at 33.5 m/s, emphasizing the need for formulas related to normal and frictional forces. Understanding these concepts is crucial for solving both scenarios effectively.
Angeluzmaia
Messages
10
Reaction score
0
Help with forces!

I need help with this, I've been trying but I don't understand it. Can anyone help me? :frown: :confused:

A 830.0 kg car traveling on a level road at 27.0 m/s (60.5 mi/hr) can stop, locking its wheels, in a distance of 61.0 m (200.1 ft). Find the size of the horizontal force which the car applies on the road while stopping.

 
Physics news on Phys.org
try W = \Delta K
 
I don't know how is exactly that formula, but I find one, maybe it's the same.

F=m*a

a= (v^2-v_{i}^2)/(2* \Delta x)


Now I have other problem

Find the stopping distance of that same car when it is traveling up a 19.9° slope, and it locks its wheels while traveling at 33.5 m/s (75.0 mi/hr). Assume that \mu_k does not depend on the speed.
 
Last edited:
please help me, this is urgent...
Any formulas will be helpful
 
1. What's the normal force exerted on the ground upon the car?
2. How is the magnitude of frictional force related to the magnitude of the normal force?
 

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

Finding the horizontal force that the road applies to the car
Replies
13
Views
2K
Stopping distances on a downward slope
Replies
3
Views
2K
Find the stopping distance of that same car
Replies
2
Views
2K
Newton's law problem: Pushing 2 stacked blocks on a horizontal table
Replies
13
Views
3K
Help with work and energy problem
Replies
1
Views
2K
Calculating the Stopping distance
Replies
7
Views
3K
Displacement of an object with certain Ek stopped by Frictional Force
Replies
3
Views
2K
Stopping distance of a car rolling down a hill
Replies
4
Views
2K
Solving Work and Energy Problems on a Slope
Replies
10
Views
3K
Minimum force required to prevent sliding down
Replies
1
Views
3K

Hot Threads

Recent Insights

Back
Top