Posted by **Megan** on Thursday, March 10, 2011 at 6:15pm.

How much work must be done to accelerate a baton from rest to an angular speed of 7.27 rad/s about its center? Consider the baton to be a uniform rod of length 0.529 m and mass 0.478 kg

- Physics please help!! -
**drwls**, Thursday, March 10, 2011 at 7:15pm
The moment of inertia of a uniform rod, about a line through the center and perpendicular to the rod, is

I = M L^2/12

The kinetic energy of the rotating rod is (I/2)* w^2

w = 7.27 rad/s L = 0.529 m

M = 0.478 kg

Calculate that kinetic energy. It equals the work required.

## Answer This Question

## Related Questions

- physics - How much work must be done to accelerate a baton from rest to an ...
- Physics - A high school cheerleader has a baton that is 1 meter long with a 100 ...
- physics - A uniform rod is set up so that it can rotate about a perpendicular ...
- Phy 231 - A baton consists of a nearly massless rod of length L and two spheres ...
- physics - a cheerleader has a baton that is 1 meter long and has a 100 gram mass...
- Physics - A baton twirler tosses a baton into the air with an initial angular ...
- physics - A uniform thin rod of length 0.55 m and mass 5.5 kg can rotate in a ...
- AP Physics - A uniform thin rod of length 0.3m and mass 3.5kg can rotate in a ...
- physics - A uniform horizontal rod of mass 2.4 kg and length 0.86 m is free to ...
- physics - A long uniform rod of length 4.76 m and mass 5.48 kg is pivoted about ...

More Related Questions