# Physics

A racecar driver speeds around a circular track of radius 100 m at a velocity of 50 km/hr. The coefficient of friction us between his tires and the road is 0.20. It begins to rain, reducing us to 0.15. What must he change his velocity to in order to maintain his path without skidding off of the track? (use units of km/hr.).

When on the verge of skidding

M V^2/R = M g * (mu,s)

mu,s is the static coeffiecent of friction, 0.15 in this case. Cancel the M's and solve for V. It wil be in m/s if you use g = 9.8 m/s^2, so you will have to convert that V
to km/h

1. 👍 0
2. 👎 0
3. 👁 74

## Similar Questions

1. ### DYNAMICS

A racecar is initially travelling at 75 mph at point A as it enters the S-curve shown. In order to successfully traverse the curve, the racecar driver applies his brakes and decelerates uniformly between point A and B. Point B is

asked by KBROM on April 21, 2017
2. ### dynamics

A racecar is initially travelling at 75 mph at point A as it enters the S-curve shown. In order to successfully traverse the curve, the racecar driver applies his brakes and decelerates uniformly between point A and B. Point B is

asked by kbrom on April 19, 2017
3. ### Physics 141

A car is on a circular track of radius r = 100 m. It's tangential speed is 30 m/s. How many lateral gravities does the driver feel?

asked by dakota22 on February 21, 2014
4. ### physics

A 1310-kg racecar is driving around a circular track of radius 153 m. In the instant shown in the figure, the vehicle has a forward speed of 31.7 m/s and is slowing at a rate of 5.35 m/s2. What is the magnitude of the net force

asked by kg90 on October 9, 2013
5. ### Physics

A racecar driver has to hold on tightly when going around a banked curve. How many "gs" does the driver experience in a 2200 kg car going around a circle with a radius of 95 meters at 25 m/s?

asked by mssailormouth on June 16, 2019
6. ### physics

A motorcycle stunt rider wants to do a loop-the-loop within a vertical circular track. If the radius of the circular track is 10.0 m, what minimum speed must the motorcyclist maintain to stay on the track? Suppose the radius of

asked by myra on April 11, 2012
7. ### Physics

I'm lost on this problem too! A 70kg stunt driver rounds a circular corner at 96km/hr (convert to m/s). The centripetal force on the driver is 856N. Calculate the radius in meters of the path that the driver took around the

asked by Mariam on February 21, 2018
8. ### physics

he a body is moving in a circular track of radius 100m with a velocity 120m/s.determine the banking angle of the track (g=9.8m/s)

asked by joy on October 5, 2016
9. ### Physics

A race car travels 110 m/s around a circular track of radius 197 m. The track is banked at 22 degrees from the horizontal with a friction constant of 0.14. What is the magnitude of the resultant force on the 2800 kg driver and his

asked by Tim on December 4, 2012
10. ### phyiscs

A 14.5 kg toy car is driving around a horizontal circular track with a period of 8.0 seconds. The radius of the circular track is 1.1 meters. What is the force of friction in Newtons between the car and the track that is necessary

asked by zach on May 7, 2018

More Similar Questions