# Calculate angular velocities and alpha values?

1. Mar 21, 2015

### datanhlg

1. The problem statement, all variables and given/known data
A lightweight bar, stiff stick of length L, at either end are two small spheres of mass $m_{1} = m_{2} = m$. Bar may turn in vertical horizontal axis passing through point O on the way its a bar $\frac{L}{3}$. At first, the bar is vertical. Due to a slight impact, the loss of balance and start axis through O. Skip any friction.

2. Relevant equations
a) Calculate angular velocities of the bar when it is vertical with an angle alpha?

b) Know that when the force effects the globe by acting on the $m_{1}$, with 1,8 times its weight when he began breaking away from the bar. Calculate the alpha angle for the time ball of $m_{1}$ separated from the bar?

3. The attempt at a solution

Here image of this

2. Mar 21, 2015

### Suraj M

3. Mar 21, 2015

### Suraj M

Assuming by
you mean its fixed at $\frac{L}{3}$
First i think you might need to find the moment of inertia of the rod, do that then
find the vertical height through which the $m_1~and~m_2$fall through and move up respectively. find the total loss in potential energy.

Last edited: Mar 21, 2015