Frictional Forces and Stopping Distance in Physics

In summary, a car traveling at 49.0 mi/h on a horizontal highway will have a minimum stopping distance of 12.28 meters on a rainy day with a coefficient of static friction of 0.099. On a dry surface with a coefficient of static friction of 0.596, the stopping distance will be 3.07 meters. To find the frictional force exerted on the car, the work done by the frictional force can be calculated by multiplying the frictional force by the stopping distance. The KE per kg of the car can be calculated by dividing the kinetic energy by the mass of the car.
  • #1
Susie babe
3
0
A car is traveling at 49.0 mi/h on a horizontal highway.

(a) If the coefficient of static friction between road and tires on a rainy day is 0.099, what is the minimum distance in which the car will stop?

(b) What is the stopping distance when the surface is dry and µs = 0.596?Thank you, oh and please don't give me only the answer, the full solution would be very much helpful.
 
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  • #2
How would you find the frictional force exerted on the car?

If the car is traveling at 49.0 miles per hour, how much KE per kg will the car have? i.e. KE/mass ?

Final Hint: what is the work done by the frictional force (think of the definition of work done by a force)
 

Related to Frictional Forces and Stopping Distance in Physics

What is friction?

Friction is a force that resists the relative motion between two surfaces in contact with each other.

What are the factors that affect friction?

The factors that affect friction include the nature of the surfaces in contact, the applied force, and the presence of any lubricants.

How is friction measured?

Friction can be measured using a device called a friction meter, which measures the force required to move one surface over another.

What is the difference between static and kinetic friction?

Static friction is the force that prevents two surfaces from moving when they are in contact and at rest, while kinetic friction is the force that opposes the motion of two surfaces that are already in motion.

How can friction be reduced?

Friction can be reduced by using lubricants, smoothing the surfaces, or reducing the applied force between the surfaces.

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