The angular speed of an automobile engine is increased at a constant rate from 1120 rev/min to 2560 rev/min in 13.8 s. (a) What is its angular acceleration in revolutions per minute-squared

Complete Question

The angular speed of an automobile engine is increased at a constant rate from 1120 rev/min to 2560 rev/min in 13.8 s.

(a) What is its angular acceleration in revolutions per minute-squared

(b) How many revolutions does the engine make during this 20 s interval?

rev

a

b

Explanation:

From the question we are told that

   The initial  angular speed is

    The angular speed after  is

    The time for revolution considered is  

 Generally the angular acceleration is mathematically represented as

=>        

=>      

Generally the number of revolution made is  is mathematically represented as

=>      

=>      

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+15-35=-20

going in opposite directions