1. The problem statement, all variables and given/known data A car is rounding a curve on the interstate, slowing from 30 m/s to 22 m/s in 7.0 seconds. The radius of the curve is 30 meters. What is the acceleration of the car? vi=30 m/s vf=22 m/s t=7 s r=30 meters. 2. Relevant equations change in velocity/change in time= tangential acceleration ? centripetal acceleration = v^2/ r = -radial acceleration a= a_radial + a_tangential (acceleration in vector notation) 3. The attempt at a solution change in v/ change in time= (22m/s-30 m/s) / (7s)= tangential acceleration= -1.14 m/s^2 I'm not sure how to find the centripetal acceleration? Does the problem mean find the total acceleration at each point? Meaning using each v to find centripetal acceleration? (30)^2/ 30= (22)^2/ 30= Maybe the difference between the two? There's no way to check my answer.