- #1
Yae Miteo
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Homework Statement
A mass m = 5.5 kg hangs on the end of a massless rope L = 1.81 m long. The pendulum is held horizontal and released from rest. How fast is the mass moving at the bottom of its path?
Homework Equations
[tex]a_c = \frac {v^2}{r}[/tex]
[tex]F = ma[/tex]
[tex]v = v_o + at [/tex]
The Attempt at a Solution
I attempted to solve the problem by coming up with a formula, and then plugging in the numbers. To begin,
[tex]F = ma = m \frac {v^2}{r}[/tex]
[tex]v = v_o + at = 0 + t \frac {v^2} {r} [/tex]
so more neatly
[tex]F = m \frac {v^2}{r}[/tex]
[tex]v = t \frac {v^2} {r} [/tex]
but from here I'm stuck. I'm not sure how to find time, or even if it needs to be found at all. Any suggestions?