## Trending News

Promoted

Anonymous

# find the angular momentum of the record. please help its due tomorrow!!?

a 0.015 kg record with a radius of 15 cm rotates with an angular speed of 33 1/3 rpm. find the angular momentum of the record.

are u supposed to convert 33 1/3 to seconds? or what???? could someone please work it out for me so i could see and learn how to do it? thanks so much!

### 3 Answers

Relevance

- Dr DLv 71 decade agoFavorite Answer
It's I*ω

I = mass moment of inertia = 1/2 * m*r^2

= 1/2 * 0.015 * 0.15^2

ω = 100/3 * 2π / 60

we need to convert rpm to radians per second

Ang mom = 5.89 x 10^-4 kg m^2 / s

- 1 decade ago
L=I X W

I=moent of inertia of the disc with refeence to the axis passing through its centre that is I=(MR)R/2

to convert angular speed one revoluion =2 pie radians

where Pie = 22/7

and minute=60 seconds

Still have questions? Get your answers by asking now.