- #1
Hotsuma
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Homework Statement
A 66-cm-diameter wheel accelerates uniformly about its center from 120 rpm to 260 rpm rpm in 4.9 s.
Homework Equations
[itex]a_t = r\alpha [/itex]
[itex]a_c= r\omega^2 [/itex]
[itex]a= a_r+a_t [/itex]
The Attempt at a Solution
I have discovered that:
[itex]\alpha = 3.0 \frac{rad}{s^2} [/itex]
and
[itex]a_t = 0.99/frac{m}{s^2} [/itex]
I have tried using Pythagoras's theorem to solve for [itex]a_r [/itex], but that value does not work. What am I doing wrong?