(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A rock of mass m=2kg is tied to a string of length r=4m is rotating at a constant rate and subject to a centripetal force Fc=32N.

Find the:

a)Centripetal acceleration

b)Angular velocity

c)Angular momentum

2. Relevant equations

a) Ac=V^{2}_{T}/R (Fc=V^{2}_{T}/R; so, V^{2T}=Fc x R/m?)

b) V_{T}=angular velocity x radius

c) l = mv_{T}r

3. The attempt at a solution

a) 32 x 4/2 =64[m^{2}/s]

b) V^{2}_{T}= 64, so V_{T}= 8; 8/4 =2 [rad/s]

c) 2 x 8 x 4=64[kg x m^{2}/s]

I know this is simple stuff, but I'm new to physics, and just wanted to double-check that I'm getting my formulas right. Thanks everyone!

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# Homework Help: Rotational Motion

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