Uniform Circular Motion of a race car

AI Thread Summary
A 990-kg race car can navigate an unbanked turn at 42 m/s with a radius of 140 m, aided by a downforce of 12,000 N. The discussion revolves around calculating the coefficient of static friction required for this scenario and determining the maximum speed without downforce. Users express confusion about equating static friction to centripetal force and how to adjust calculations when downforce is removed. The importance of maintaining the thread's reply status is also mentioned. Clarifications on these physics concepts are sought to solve the homework problem effectively.
wizzpowa
Messages
10
Reaction score
0

Homework Statement



A 990-kg race car can drive around an unbanked turn at a maximum speed of 42 m/s without slipping. The turn has a radius of 140 m. Air flowing over the car's wing exerts a downward-pointing force (called the downforce) of 12000 N on the car. (a) What is the coefficient of static friction between the track and the car's tires? (b) What would be the maximum speed if no downforce acted on the car?

Homework Equations



F s (max) = v squared / r
Fn - mg - Fd = 0

The Attempt at a Solution



So i got the normal force, but I am so confused on how to get Fs max. Isn't it equal to the centripetal force??
 
Physics news on Phys.org
Also, for part B, I know you just have to make the downforce equal to zero, but i am not sure how to find V.
 
hi wizzpowa! :smile:

do you still need help with this?

btw, never reply to your own first post …

it takes the thread off the No-Replies list! :redface:​
 

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Similar threads

A Car on a Banked Curve Moving in Uniform Circular Motion
Replies
7
Views
3K
Acceleration in uniform circular motion is uniform or non-uniform?
2
Replies
55
Views
3K
Car that undergoes non-uniform circular motion
Replies
1
Views
1K
Uniform Circular Motion Problem
Replies
1
Views
1K
Is Vertical Circular Motion Ever Uniform?
Replies
10
Views
3K
Circular Motion of a Cyclist and a Car going around a bend in the road
Replies
6
Views
4K
Question Regarding Circular Motion and Normal Forces
Replies
2
Views
3K
Circular Motion. Roller-coaster mass of car and max speed
Replies
7
Views
6K
What is the meaning of work done for non-uniform circular motion?
Replies
11
Views
2K
Maximum Speed for Circular Turns: Radius Doubling Question Explained
Replies
4
Views
6K

Hot Threads

Recent Insights

Back
Top