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My question is:

If a car is moving at 33m/s^-1 down a 20 degree slope, the friction between car tires and the road surface is 0.58, what is the shortest distance and time in which it can stop?

I assume that Fmax= u R is correct formula?

(where Fmax=force max, u=coeff of friction, and R= normal reaction)

I also assume that R = mgsin20

(where m=mass, g=9.8, sin 20 for angle of slope)

Any help would be much appreciated!

thanks

-Polly

If a car is moving at 33m/s^-1 down a 20 degree slope, the friction between car tires and the road surface is 0.58, what is the shortest distance and time in which it can stop?

I assume that Fmax= u R is correct formula?

(where Fmax=force max, u=coeff of friction, and R= normal reaction)

I also assume that R = mgsin20

(where m=mass, g=9.8, sin 20 for angle of slope)

Any help would be much appreciated!

thanks

-Polly

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