A truck engine slows down from 3700 rpm to 1800 rpm in 4.25 s. How many revolutions were made by the engine during this time

194.81 revolutions

Explanation:

Given that,

Initial angular velocity,

Final angular velocity,

Time, t = 4.25 seconds

We need to find the number of revolutions occur during this time.

3700 rpm = 387.46 rad/s

1800 rpm = 188.49 rad/s

Let is angular acceleration. Using first equation to find it.

Now let us suppose that the number of revolutions are .

or

Hence, there are 194.81 revolutions.