physics

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Here is the problem and answers. how do i reach the answer?
A car at the Indianapolis-500 accelerates uniformly from the pit area, going from rest to 325 km/h in a semicircular arc with a radius of 198 m.
Determine the tangential acceleration of the car when it is halfway through the turn, assuming constant tangential acceleration.
6.55m/s2
Determine the radial acceleration of the car at this time.
20.6m/s2
If the curve were flat, what would the coefficient of static friction have to be between the tires and the roadbed to provide this acceleration with no slipping or skidding?
2.2

  • physics -

    tangentialacceleration:
    vf^2=Vi^2+2ad where d is half the turn, or PI*198/2 Be certain to convert Vf to m/s

    radial acceleration= V^2/r where V is in m/s.

    Force=m*v^2/r
    mu*mg=m v^2/r
    solve for mu.

  • physics -

    If this question is Webassign related, you may have to 1/2 the answers you plug into the textbox, like I did.

    Bub Pursley describes it correctly.

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