A sharpening wheel is traveling at 5 rad/s, it slows down to rest in 30 seconds while sharpening an axe. What is its angular acceleration?

Angular acceleration rad/s^2

Explanation:

Given

Initial Angular velocity (w1) rad/s

Final Angular velocity (w2) rad/s

Time taken to change velocity from w1 to w2 seconds

Angular acceleration is equal to the change in angular velocity to the time taken for making thing change

Hence, Angular acceleration

rad/s^2

c) up is the direction the magnetic force is acting on the charge.