Posted by Sam Line on Thursday, October 29, 2009 at 12:32pm.
While fishing, you get bored and start to swing a sinker weight around in a circle below you on a 0.25m piece of fishing line. The weight makes a complete circle every 0.50 sec. What is the angle that the fishing line makes with the vertical?

Physics  MathMate, Thursday, October 29, 2009 at 6:08pm
Centripetal acceleration, Ac (horizontal)
= (1/2)v²/r m/s²
Acceleration due to gravity, g (vertical)
= 9.8 m/s²
Angle with vertical, θ
= tan^{1}(Ac/g)

Physics  hopsy, Monday, January 17, 2011 at 9:21pm
76.1°
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