once a motor is turned off, it takes 0.75 seconds to come to a stop. what is the average angular acceleration
I have no idea how fast it was spinning.
To find the average angular acceleration, you need to know the angular velocity and the time it takes for the motor to come to a stop.
Angular acceleration (α) is defined as the change in angular velocity (ω) divided by the time (t):
α = (Δω) / t
Since the motor comes to a stop, its final angular velocity is 0 rad/s (Δω = 0). The given time is 0.75 seconds (t = 0.75 s).
Therefore, the average angular acceleration can be calculated as:
α = (0 - ω) / t
To find ω, we need to know the initial angular velocity. If the initial angular velocity is not provided, we cannot determine the average angular acceleration.
To find the average angular acceleration, we need to know the initial angular speed and the time taken to come to a stop.
In this case, we know that it takes 0.75 seconds for the motor to come to a stop. However, we are not given the initial angular speed. Without this information, we cannot calculate the average angular acceleration.