Answer:
The minimum coefficient of static friction between the road and the car's tires is 0.816
Option "C"
Explanation:
Given;
velocity of the car, v = 40.0 m/s
radius of horizontal curve, r = 200 m
For a minimum coefficient of static friction between the road and the car's tires that will allow the car to travel at the given speed without sliding, centripetal force must equal frictional force.
![F_{frictional} = F_{centripetal}\\\\\mu mg = \frac{mv^2}{r} \\\\\mu = \frac{v^2}{rg}](https://tex.z-dn.net/?f=F_%7Bfrictional%7D%20%3D%20F_%7Bcentripetal%7D%5C%5C%5C%5C%5Cmu%20mg%20%3D%20%5Cfrac%7Bmv%5E2%7D%7Br%7D%20%5C%5C%5C%5C%5Cmu%20%3D%20%5Cfrac%7Bv%5E2%7D%7Brg%7D)
where;
μ is the minimum coefficient of static friction
![\mu = \frac{40^2}{200*9.8} \\\\\mu = 0.816](https://tex.z-dn.net/?f=%5Cmu%20%3D%20%5Cfrac%7B40%5E2%7D%7B200%2A9.8%7D%20%5C%5C%5C%5C%5Cmu%20%3D%200.816)
Thus, the minimum coefficient of static friction between the road and the car's tires is 0.816
Option "C"
All it really is is velocity.
<span>When it hits the pin, momentum is conserved and the pin is sent flying. The ball continues to roll with reduced kinetic energy. </span>
The angle of reflection is "60°".
Here we apply the law of the concept of reflection then we get the final answer easily.
The angle of incident = angle of reflection
Then, the Angle of the incident =60°
What is reflection?
- Reflection is the phenomenon of light rays returning to the source after striking an obstruction.
- It resembles the way a ball bounces when we toss it on a hard surface.
- Some of the light rays that strike an item are reflected, some of them travel through it, and the remainder are absorbed by the object.
- The given values are:Light from a monochromatic source,= 560 nm
- The angle of incidence,= 60°
- The surface of fused quartz (n),= 1.56
- When a light ray does exist on a flat surface, the law or idea of reflection should apply since it includes both the reflected and "normal" light rays at the mirror surface.
- According to the above law,Angle of incident = angle of reflection
- Then, Angle of incident =60°.
To learn more about reflection visit: brainly.com/question/15487308
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