Physics
posted by engmath .
A car traveling on a flat (unbanked) circular track accelerates uniformly from rest with a tangential acceleration of 1.70 m/s2.The car makes it one quarter of the way around the circle before it skids off the track. Determine the coefficient of static friction between the car and track from these data.
I thought the answer was 0.5449 but its wrong. no matter what I do i keep getting the same answer!

Why would you think the answer is .5446? I will be happy to critique your work

you need to round off to three sig digits

α=a/r
the time it takes to travel π/2 radians is
related by
π/2=.5*a*t^2/r
solve for t
t=sqrt(π*r/a)
ω=α*t
Plug in t and a/r
ω=sqrt(a*π/r)
The force is m*ω^2*r
F=m*a*π
friction is
m*g*µs
then
m*g*µs=m*a*π
so basically....
µs=a*π/g
=1.70pi/9.8= 0.54497 ====> sig figs 0.545 
and that answer comes up as incorrect...

From which book this tasks?
Respond to this Question
Similar Questions

PHYSICS
super easy (I think) but I must be missing some concept... A race car starts from rest on a circular track. The car increases its speed at a constant rate at as it goes 5.00 times around the track. Find the angle that the total acceleration … 
Physics
A 1900kg car starts from rest and drives around a flat 56mdiameter circular track. The forward force provided by the car's drive wheels is a constant 1000N. a. What is the magnitude of the car's acceleration at t=13s? 
physics
A car at the Indianapolis500 accelerates uniformly from the pit area, going from rest to 320 km/h in a semicircular arc with a radius of 190 m. 1.) Determine the tangential acceleration of the car when it is halfway through the turn, … 
Physics
A car starts from rest and travels along a circular track with a radius of 55.0 meters. The car starts out at a position due East of the center of the track, heading due North initially around the track, which is counterclockwise. … 
physics
A car starts from rest and travels along a circular track with a radius of 55.0 meters. The car starts out at a position due East of the center of the track, heading due North initially around the track, which is counterclockwise. … 
physics
A race car starts from rest on a circular track. The car increases its speed at a constant rate at as it goes 2.75 times around the track. Find the angle that the total acceleration of the car makes with the radius connecting the center … 
Physics
A 1900 car starts from rest and drives around a flat 50diameter circular track. The forward force provided by the car's drive wheels is a constant 1300 . A) What is the magnitude of the car's acceleration at ? 
physics
Car traveling on circular track. Point A is at positive x,y. Point B is at positive x, negative y. A car is traveling around a horizontal circular track with radius r = 220 m as shown. It takes the car t = 51 s to go around the track … 
pyscics
a race car starts from rest on a circular track the car in races as its speed at a constant rate of as it goes 2.75 times around the track.find the angle that the total acceleration of the car makes with the radius connecting the centre … 
physics
a race car starts from rest on a circular track.the car increases its speed at constant rate at as it goes 2.75 times around the track.find the angle that the total acceleration of the car makes with the radius connecting the centre …