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**1. Homework Statement**

Hi, I was wondering what is the difference between the equations an=w^2 x R vs an=V^2 / R? I thought both of these equations were the same? What is the normal acceleration at C and D?

**2. Homework Equations**

an=w^2 x R vs an=V^2 / R?

**3. The Attempt at a Solution**

If I use the equation w^2 R for the normal component

At point C I get (16)^2 x (0.25) = 64ms-2

At point D I get (16)^2 x (0.25) = 64ms-2

However, if I use the equation v^2 / R for the normal component

At point C I get (6)^2 / (0.25) = 144ms-2

At point D I get (2)^2 / (0.25) = 16ms-2

Why is this so?