If a 1000 kg car is moving at 10 m/s brakes to stop in 5 seconds.

AI Thread Summary
To determine the average braking force for a 1000 kg car moving at 10 m/s that stops in 5 seconds, the relevant equations of motion and Newton's second law can be applied. The initial velocity is 10 m/s, and the final velocity is 0 m/s after 5 seconds, leading to a deceleration calculation. The average braking force can be found using the formula F = ma, where 'm' is the mass of the car and 'a' is the calculated deceleration. Participants emphasize the importance of showing an attempt at the solution to receive effective assistance. This discussion highlights the need for a structured approach to solving physics problems.
bmac88
Messages
1
Reaction score
0

Homework Statement



Hey, if a 1000 kg car is moving at 10 m/s brakes to stop in 5 seconds. What would the avergae breaking force be?

Homework Equations





The Attempt at a Solution

 
Physics news on Phys.org


I'm afraid you'll have to provide some kind of attempt at a solution before you can receive help.

If you post some equations that you think might be important for this problem then I can point you in the right direction :)
 

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

Help with question on motion: Avoiding a rear-end collision
Replies
6
Views
3K
Solving for Car Speed and Stopping Time in a Braking Scenario
Replies
1
Views
6K
Calculating Separation of Cars in a Convoy Moving at Max Speed
Replies
4
Views
3K
Reaction time while stopping a car
Replies
29
Views
3K
Motion problem: motorist's braking time including reaction time
Replies
1
Views
2K
Tension in a Rope from Lowering Down and Friction Braking Torque at Stop
Replies
3
Views
2K
Stopping distances on a downward slope
Replies
3
Views
2K
"How far did the car move while braking?"
Replies
14
Views
2K
Is the Hertzian Contact Model Suitable for Simulating Car Braking on Wet Roads?
Replies
4
Views
2K
How Do You Convert Newtons to Watts for a Maglev Train Acceleration?
Replies
5
Views
7K

Hot Threads

Recent Insights

Back
Top