b. 81 rad
Explanation:
First of all, we need to understand how much time it takes for the wheel to stop. This can be calculated by using the equation
where
is the angular velocity at time t
is the initial angular velocity
is the angular acceleration (negative because the wheel is slowing down)
is the time
If we substitute , we can calculate the time t at which the wheel stops:
And now we can use the equation for the angular displacement to calculate the total angle covered by the wheel during this time:
A
Explanation:
A. Objects in motion tend to stay in motion unless acted upon by an outside force.