What is the minimum stopping distance

AI Thread Summary
To determine the minimum stopping distance for a 6000 kg load on a truck, the maximum horizontal force of 8000 N is crucial. Using the formula F = ma, the acceleration can be calculated, leading to the necessary kinematic equations for stopping distance. A diagram is recommended for clarity in visualizing the problem. The calculated stopping distances vary, with one participant arriving at 150 m, while another suggested 156 m, indicating potential calculation discrepancies. The discussion emphasizes the importance of correctly applying physics principles to solve the problem.
emily69_420
Messages
3
Reaction score
0
I have gotten stuck on this problem because I can't figure out the formula to solve it so really all i need is the formula. I've read the book but i have this class online and have no instructor...please help if you can.
Heres the Problem:
A load of steel with a mass of 6000 kg rests on a flatbed of a truck. It is held in place by metal brackets that can exert a maximum horizontal force of 8000 N. When the truck is traveling 20 m/s, what is the minimum stopping distance if the load is not to slide foreward into the cab?
 
Physics news on Phys.org
F = ma.

Here's a start. You know the F is 8000N. You know that the weight of the load from gravity (which has a=32 ft/sec sec) is 6000N. So what is the acceleration that results from a force of 8000N?

Carl
 
8000/6000=a?
 
You'll find that it works really well to draw out a diagram on this one. Remember that the block is also traveling at 20 m/s.
 
Ok i think i figured it out but i am getting two different answers when i do the problem...i got 150 m and 156 m can someone tell me if i might be close to the answer?
 
F=ma
You have the mass of the load already so you can find the maximum acceleration

Find the maximum acceleration you can have without the straps breaking. Then calculate the stopping distance using your kinematics equations.

I get 150 m as an answer
 
Last edited:

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 'Calculation of Tensile Forces in Piston-Type Water-Lifting Devices at Elevated Locations'

Thread 'Calculation of Tensile Forces in Piston-Type Water-Lifting Devices at Elevated Locations'

Figure 1 Overall Structure Diagram Figure 2: Top view of the piston when it is cylindrical A circular opening is created at a height of 5 meters above the water surface. Inside this opening is a sleeve-type piston with a cross-sectional area of 1 square meter. The piston is pulled to the right at a constant speed. The pulling force is（Figure 2）： F = ρshg = 1000 × 1 × 5 × 10 = 50,000 N. Figure 3: Modifying the structure to incorporate a fixed internal piston When I modify the piston...
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 Chapter 4: Stopping Time for a Truck Carrying 6000 kg Load at 15 m/s
Replies
2
Views
1K
What Is the Minimum Stopping Distance to Prevent Crate Sliding?
Replies
3
Views
4K
Physics help on minimum stopping distance
Replies
2
Views
2K
Minimum stopping distance problem
Replies
2
Views
5K
Help needed for finding stopping distance?
Replies
8
Views
4K
What Is the Stopping Distance of a Mobile Machine Pushed at 1.2 m/s?
Replies
12
Views
2K
What Is the Stopping Distance When Initial Speed or Friction Force Is Tripled?
Replies
6
Views
4K
Find the Stopping Distance with Calculus
Replies
5
Views
3K
Truck carrying a box, friction problem
Replies
10
Views
5K
How can Superman minimize the braking distance?
Replies
21
Views
2K

Hot Threads

Recent Insights

Back
Top