Rotational Dynamics Problem: Rotating Rod 

you have no idea how long i was searching for this types of questions thank you!❤

What if we wanted to calculate the angular velocity in a specific moment? For example in t= 0,5 second? What equation should we use?

Hi physics ninja! Any ways you could do some gravitational field strength questions? Especially finding the altitude above the earth etc?? Keep up the great work btw!

I tried to calculate how much time it took for the ruler to fall on the ground at angle theta. And I got to the differential equation. Angular acceleration is equal to some constant times cos(theta). In other words, f’’(t)=C*cos(f). This differential equation is impossible? With some error in mind, I made angle small enough that cos(f) is essentialy 1. Then it can be deduced that f(t)=C^2/2. And when f=theta. We have the formula for time, but this is still approximation. How would you deal with this problem, finding exactly the solution of this dif equation?

why the work done by torque not considered, thanks