Physics banking problems w\ friction.

H: In summary, a 1200-kg car traveling at 90km/h rounds a curve of radius 70m banked at an angle of 12 degrees. The equation mv^2/r = Fc is used to determine the necessary friction force, and the calculation results in a coefficient of friction of .72. This confirms that friction is required, with a force perpendicular to the normal force.
  • #1
JeremyWsmith
10
0

Homework Statement



A 1200-kg car rounds a curve of radius 70m banked at an angle of 12 degrees. If the car is traveling at 90km/h, will friction force be required? If so, how much and in which direction?

Homework Equations



mv^2/r = Fc

The Attempt at a Solution


90km/h = 25m/s

Fc = Fnx + uFny
mv^2/r = mgsin12 + u9.8cos12

25^2 = 9.8sin12 + u9.8cos12

u=.72; The coefficient of friction .72 and the force of friction will be perpendicular to the normal force.

Can someone confirm that this is the correct answer?
 
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  • #2
You have a few errors in writing it out, but your answer is correct. You have not explained why friction is required.

AM
 

1. What is friction in physics banking problems?

Friction is a force that opposes motion and is caused by the interaction between two surfaces. In physics banking problems, friction is an important factor to consider as it affects the stability and safety of the banking structure.

2. How does friction affect banking problems in physics?

Friction plays a crucial role in determining the maximum safe speed for vehicles on banked curves. Without sufficient friction, vehicles may slip or slide off the banking surface, leading to accidents.

3. What are the different types of friction involved in physics banking problems?

There are three types of friction: static, kinetic, and rolling. Static friction is the force that prevents two surfaces from sliding against each other. Kinetic friction is the force that opposes the motion of two surfaces in contact. Rolling friction is the force that resists the motion of a rolling object.

4. How is friction calculated in physics banking problems?

The friction force can be calculated using the equation F = μN, where F is the friction force, μ is the coefficient of friction, and N is the normal force between the two surfaces in contact. The coefficient of friction depends on the materials of the surfaces and the force pressing them together.

5. How can friction be reduced in physics banking problems?

Friction can be reduced by using materials with lower coefficients of friction, such as lubricants, or by increasing the surface area of contact between two surfaces. In some cases, banking angles can also be adjusted to reduce the effects of friction.

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