YS 1710 Mech Xa The Eopert TA Human-lke GrS Set your new password- Spotiy + HV.

Question

YS 1710 Mech Xa The Eopert TA Human-lke GrS Set your new password- Spotiy + HV. 5 PM Applicatio", orenton's Lan" Begin Datei bee Dates (7%) Problem 9, Acar is driving along a circular track of dianNerd-a75km a constant speed of v20ms Ctheespertta.com 25% Part (a) write an expression for de magnitude of the acceleration a of the car items of gnes-aneten. Grade Sumnary Feedback: . dedKton per feedhei 25% Part (b) what is the mapitule, m meters per second sjured ofthe acceleration a of tear? - 25% Par. (c) Write an erpression for the minimum cocff0cient ef friction between the car's tires-nd the road that is required in order to keep the car going in circle m terma of pen-meters. 25% Part (d) What is the value ofthe minimim coefficient of friction g" between ear's tires and the road that is required-order to keep the car going in a circle?

Explanation / Answer

here,

diameter , d = 0.75 km = 750 m

radius , r = d/2 = 375 m

constant speed , v = 26 m/s

a)

the magnitude of accelration , a = v^2 /r

b)

the magnitude of accelration , a = v^2 /r

a = 26^2 /375 = 1.8 m/s^2

c)

let the coefficient of friction be u

equating the forces

u * m * g = m * a

u = a/g

d)

u = a/g

u = 1.8 /9.81 = 0.18

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