# Physics

posted by .

A 1200kg car rounds a curve of radius of 50m with a speed of 80km/hr. What is the coefficient of friction if the car is just about to skid off the road?

I got:
ac= 9.88m/s2
Fc= 11851N
I also know Ff=uFN but have no idea how to figure this out. Thx.

• Physics -

Ac = v^2/R
F = m Ac = m v^2/R
but
F = mu m g
so
mu m g = m v^2/R

mu = (v^2/R)/g

ratio of centripetal acceleration to gravitational acceleration :)

by the way on earth g is more like 9.81 m/s^2, not 9.88

## Similar Questions

1. ### Physics

Suppose the coefficient of static friction between the road and the tires on a car is 0.60 and the car has no negative lift. What speed will put the car on the verge of sliding as it rounds a level curve of 29.3 m radius?
2. ### Physics (Static Friction)

When you take your 1300-kg car out for a spin, you go around a corner of radius 56.9 m with a speed of 15.8 m/s. The coefficient of static friction between the car and the road is 0.75. Assuming your car doesn't skid, what is the force …
3. ### Physics

How to solve/ work this problem? If a curve with a radius of 88m is perfectly banked for a car traveling 75 km/h, what must be the coefficient of static friction for a car not to skid when traveling at 95km/h?
4. ### Physics

If a curve with a radius of 88m is perfectly banked for a car traveling 75km/h, what must be the coefficient of static friction for a car not skid when traveling at 95 km/h?
5. ### Physics

If a curve with a radius of 88m is perfectly banked for a car traveling 75km/h, what must be the coefficient of static friction for a car not to skid when traveling at 95km/h?
6. ### physics

A 1 500-kg car rounds an unbanked curve with a radius of 52 m at a speed of 12 m/s. What minimum coefficient of friction must exist between the road and tires to prevent the car from slipping?
7. ### Physics

I need to check my answers for the following: An Aston Martin V8 Vantage sports car has a maximum “lateral acceleration” of 0.96 “g’s”, after which the car begins to skid out of its turn. 2.1 Calculate the coefficient of …
8. ### Physics

A 1550 -kg car moves on a horizontal curved road. If the radius of the curve is 46 m and the coefficient of friction between the tires and road is 0.1, find the maximum speed the car can have so that it may not skid.
9. ### physics

Suppose the coefficient of static friction between the road and the tires on a car is 0.749 and the car has no negative lift. What speed will put the car on the verge of sliding as it rounds a level curve of 31.7 m radius?
10. ### PHYSICS?

1300 kg car rounds a banked curve of radius= 50m. If car traveling at 75 km/h and the coefficient of static friction between the tire and road is 0.45 ... 1.) what is the minimum angle of the bank needed to keep the car in the turn?

More Similar Questions