When the gear rotates 20 revolutions, it achieves an angular velocity of v = 30 rad> s, starting from rest. determine its constant angular acceleration and the time required?

solution;

Explanation:

It is given that,

Displacement,

Initial angular velocity,

Final angular velocity,

Let is its angular acceleration. Using the third equation of kinematics to find it as :

Angular acceleration,

Let t is the time required to find it as :

t = 0.83 seconds

So, the angular acceleration of the gear is and the time taken is 0.83 seconds.

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees. 

neither accurate nor precise.