Question

A bus’s tire rotates at an initial angular speed of 20.5 rad/s. The driver accelerates, and after 4.5 s the tire’s angular speed is 29.0 rad/s. What is the tire’s average angular acceleration during the 4.5 s time interval?

Answer 1

Answer on Question #42814, Physics, Mechanics

A buss tire rotates at an initial angular speed of 20.5 rad/s. The driver accelerates, and after 4.5 s the tires angular speed is 29.0 rad/s. What is the tires average angular acceleration during the 4.5 s time interval?

Solution

The change of speed is

$29-20.5=8.5rad/s$

Then acceleration is

$n=\frac{8.5}{4.5}\approx 1.89rad/s^{2}$

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