Let me start with a frame from the video: Yes, this is essentially the same equation used to find the circumference ... The slope of this line will give the angular velocity (ω)and I can use ...

Remember, acceleration is the same as gradient, and acceleration = velocity change ÷ time. To find the distance travelled, look at the area under the graph. In the first 10 seconds this is the ...

The goal of the problem is to calculate the angular acceleration of the rotor. The analysis for this is provided below. This result shows that, although both rotation components for the rotor are ...