Posted by **phys** on Thursday, April 8, 2010 at 6:24pm.

can you tell me what i did wrong on this problem

Rigid rods of negligible mass lying along the y axis connect three particles. The system rotates about the x axis with an angular speed of 3.30 rad/s.

4kg,y=3.00m

2kg,y=-2.00m

3kg,y=-4.00m

a)Find the total rotational kinetic energy evaluated from 1/2 I omega^2

4(3^2)+2(2^2)+3(4^2)=92

.5(92)(3.3)^2

b)Find the tangential speed of each 4kg and 3kg particles

4kg: 4x3.3=13.2m/s

3kg: 3x3.3=9.9m/s

c)Find the total kinetic energy evaluated from Σ mi vi2/2

.5(4kg)(6^2)+.5(2kg)(4^2)+.5(3kg)(8^2)=184

i don't know why i got these wrong

## Answer This Question

## Related Questions

- physics(check my answer) - can you tell me what i did wrong on this problem ...
- Physics - The rigid object shown in Fig. 10-63 consists of three balls and three...
- physics - Three particles, each of mass 3.0 kg, are fastened to each other and ...
- Physics - The rigid object shown in Fig. 10-63 consists of three balls and three...
- CUC - 1.Two masses of 4gm and 6gm respectively are attached to the ends of a ...
- physics - Three objects lie in the x, y plane. Each rotates about the z axis ...
- Science Maths - Sir, My question is as below:- Three particles a b & c of mass m...
- Physics - 1. The problem statement, all variables and given/known data A 2.0-m ...
- physics - Physics Genius! please let me! Three objects lie in the x, y plane. ...
- college physics - In the figure below, two particles, each with mass m = 0.82 kg...

More Related Questions