(adsbygoogle = window.adsbygoogle || []).push({}); Help!!!A question on circular motion

1. The problem statement, all variables and given/known data

a) A car is accelerated around a level circular track of radius 150 m. At time t=0 it has a speed of 15m/s and a total linear acceleration of 1.8m/s^2. Find its angular acceleration.

b)assume the angular acceleration remains constant at the value found in a). At what time will the car start to skid if the coefficient of friction between the tires and the road is 0.35.

3. The attempt at a solution

a) total distance: circumference: pi times diameter=pi times 300m=942.48m

average speed = (15+16.8)/2=15.9m/s

time used: 942.48/15.9=59.28s

acceleration= (v^2)/r=15.9^2/150=1.69m/s^2

b)

For this question I know that I need to find the mass for the car first, but I don't really know how to get the answer. After that I can use the equation:F=ma to get the force. then use several other equations to find the time

Thank you for helping me.

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# Homework Help: Help A question on circular motion

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