Posted by **hopsy** on Monday, January 17, 2011 at 9:48pm.

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 -
**bobpursley**, Monday, January 17, 2011 at 9:57pm
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 -
**Josh**, Monday, October 24, 2016 at 6:42pm
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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