- #1
starstruck_
- 185
- 8
I was working on a centripetal question where it said that on glare ice, any car needs to travel 60 km/h to successfully make it through the banked highway, and in good road conditions, a car travels at 90 km/k, I had to calculate the coefficient of static friction.
When drawing my FBD, I made my friction point into the curve (so it" helped" with the centripetal acceleration). My reasoning for this was that if the speed required for the car to make it through is 60 km/h and the car is going 90km/h in good road conditions, then the friction would have to point inwards because if it didn't, then the car would go off on a tangent. I don't think this is the right reasoning though, so could someone explain why the friction would point into the curve in a better way?
When drawing my FBD, I made my friction point into the curve (so it" helped" with the centripetal acceleration). My reasoning for this was that if the speed required for the car to make it through is 60 km/h and the car is going 90km/h in good road conditions, then the friction would have to point inwards because if it didn't, then the car would go off on a tangent. I don't think this is the right reasoning though, so could someone explain why the friction would point into the curve in a better way?