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Homework Statement:
 Cloverleaf exits are approximately circular. A 1220 kg automobile is traveling 56 mph while taking a cloverleaf exit that has a radius of 35.9 m. Calculate the centripetal acceleration of the car and the centripetal force on the car. Remember that 1 mph = 0.447 m/s.
Relevant Equations:

Centripetal acceleration = ________m/s2
Centripetal force = _______ Newtons
I tried this problem 3 times. I only have two attempts left.
First time: Centripetal acceleration: 7560 m/s^2
Centripetal Force: 4.7 Newtons
Second time: Centripetal acceleration: 25.032
Centripetal Force: 4.7
Third Time:
Centripetal acceleration:2340 m/s^2
Centripetal force: 4.7 Newtons
First time: Centripetal acceleration: 7560 m/s^2
Centripetal Force: 4.7 Newtons
Second time: Centripetal acceleration: 25.032
Centripetal Force: 4.7
Third Time:
Centripetal acceleration:2340 m/s^2
Centripetal force: 4.7 Newtons