Find the distance the car travels before it stops

  • Thread starter Thread starter scoles
  • Start date Start date
  • Tags Tags
    Car
AI Thread Summary
To determine the stopping distance of a car with a mass of 2000 kg traveling at 50 km/hr and a coefficient of friction of 0.3, the force of friction must be calculated as the product of the coefficient of friction and the normal force. The normal force equals the weight of the car, which is the mass multiplied by gravitational acceleration. The car's initial speed needs to be converted to meters per second. The work done by friction, which equals the force of friction times the stopping distance, should equal the change in kinetic energy of the car. Understanding these relationships allows for the calculation of the distance the car travels before it stops.
scoles
Messages
8
Reaction score
0
A car wants to stop. The coefficient of friction is 0.3 and the mass of the car is 2000 kg. The car is traveling at 50 km/hr. Find the distance the car travels before it stops.

I know that the force of friction= the coefficient of friction x the normal force. I also know that I need to change 50 km/hr to m/s. I can't quite figure out how to find the normal force on this one(would i subtract friction from it or add it or what), and I don't see how I could find the distance it would take to stop because I do not know the time or the acceleration. Please help!
 
Physics news on Phys.org
The work of the frictional force must equal the change of kinetic energy of the car, start with that.
 
radou said:
The work of the frictional force must equal the change of kinetic energy of the car, start with that.

so does that mean that the force of friction equals the change in velocity?
 
Thread 'Voltmeter readings for this circuit with switches'

Thread 'Voltmeter readings for this circuit with switches'

TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
View full post »
Thread 'Trying to understand the logic behind adding vectors with an angle between them'

Thread 'Trying to understand the logic behind adding vectors with an angle between them'

My initial calculation was to subtract V1 from V2 to show that from the perspective of the second aircraft the first one is -300km/h. So i checked with ChatGPT and it said I cant just subtract them because I have an angle between them. So I dont understand the reasoning of it. Like why should a velocity be dependent on an angle? I was thinking about how it would look like if the planes where parallel to each other, and then how it look like if one is turning away and I dont see it. Since...
View full post »

Similar threads

Distance travelled by a car considering only air friction?
Replies
4
Views
2K
Friction direction change in a inclined circular bend (car on a road)
Replies
11
Views
1K
Final Velocity of a car with a opposing decreasing drag force
2
Replies
57
Views
2K
Stopping distances on a downward slope
Replies
3
Views
2K
Coefficient of Friction question for a cart going down a wooden ramp
Replies
18
Views
3K
Problem with the power of car
Replies
3
Views
887
How Do You Calculate Race Car Acceleration and Power Output?
Replies
20
Views
2K
Stopping distance of a car rolling down a hill
Replies
4
Views
2K
Help with question on motion: Avoiding a rear-end collision
Replies
6
Views
3K
How to find coefficient of friction *Without* mass?
Replies
3
Views
22K

Hot Threads

Recent Insights

Back
Top