# Angular Acceleration

1. a) A X kg toy car accelerates at constant rate from Vo m/s to Vf m/s in C revolutions while going around a circular track of radius R cm. Find:

- α, the magnitude of the angular acceleration of the car.
- t, the time it took to reach the final speed

2. To calculate the angular acceleration, I tried velocity over radius, Vo/R and Vf/R to get delta W(omega); and then tried using the formula Wf2 = Wo2 + 2*alpha*(C*2*Pi), and solved for alpha, but got the wrong answer. I do not know how to get time without acceleration. Any help would be appreciated.

## The Attempt at a Solution

alphysicist
Homework Helper
Hi cobrasny,

1. a) A X kg toy car accelerates at constant rate from Vo m/s to Vf m/s in C revolutions while going around a circular track of radius R cm. Find:

- α, the magnitude of the angular acceleration of the car.
- t, the time it took to reach the final speed

2. To calculate the angular acceleration, I tried velocity over radius, Vo/R and Vf/R to get delta W(omega); and then tried using the formula Wf2 = Wo2 + 2*alpha*(C*2*Pi), and solved for alpha, but got the wrong answer.