- #1
chelsea526
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Homework Statement
A 100 g bead is free to slide along an 80 cm long piece of string ABC. The ends of the string are attached to a vertical pole at A and C, which are 40 cm apart. When the pole is rotated about its axis, AB becomes horizontal.
Homework Equations
F = ma
Trigonometry formuals
The Attempt at a Solution
I am having trigonometry troubles! I only know one angle (90), and one side length (0.40 m). The bead is somewhere along the 0.80 m string, which is where the unknown angle is formed.
I thought I could use cos90 = 0.40/hyp, however, my calculator doesn't like this formula.
How can I find the lengths of the sides, so that I may then find the unknown angle??