OHHHHH I see
And yes I put wrong formula for I.
So I believe that I need to find a center of mass, get moment of inertia of each particle about that COM, add them up and it will give me net moment of inertia.
And by using KE = Iω^2, I can get the answer.
Am I on the right track?
Homework Statement
A 240g ball and a 570g ball are connected by a 48.0-cm-long massless, rigid rod. The structure rotates about its center of mass at 110 rpm.
Homework Equations
KE = Iω^2
I = 1/12(mr^2)
The Attempt at a Solution
Since it has two masses and two different radius...
Homework Statement
A 4.80kg cart has a spring with spring constant 3200N/m attached to its front, parallel to the ground. This cart rolls at 4.40m/s toward a stationary cart with mass 1.60kg .
Homework Equations
PEspiring = 1/2*kx^2
KE = 1/2*mv^2
The Attempt at a Solution
I was...
Homework Statement
I need to find a formula for the friction in the system.
I had a disk and a pulley connected to a rotation sensor on each side.
I wrapped a pulley with a string and there was a small mass attached to the bottom.
As I let that mass fall, it would fall and spin a pulley...