Physics
posted by Jim .
Another problem I need help with.
An auto race is held on a circular track. A car completes one lap in a time of 20.1 s, with an average tangential speed of 43.1 m/s. Find the following.
The following did not follow.
I apologize for that. Here is the entire question.
An auto race is held on a circular track. A car completes one lap in a time of 20.1 s, with an average tangential speed of 43.1 m/s. Find the following.
(a) the average angular speed in rad/s
(b) the radius of the track in m
a) Divide 2 pi radians (one lap) by 20.1 seconds. The answer will be in radians per second.
b) 43.1 m/s = (circumference)/20.1 s
= 2 pi R /(20.1 s)
R = (43.1 m/s)*20.1 s/(2 pi)= ? m
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