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MechaMZ
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Homework Statement
A ball swings in a vertical circle at the end of a rope 1.50 m long. When the ball is 37.5° past the lowest point on its way up, its total acceleration is (-22.5 i + 20.2 j) m/s2.
The Attempt at a Solution
Determine the magnitude of its radial acceleration.
My attempt, but wrong answer.
1. total acceleration = 30.237, by resolving (-22.5 i + 20.2 j) m/s2 into R
2. build a geometry triangle, to calculate ar
30.237sin 37.5 = ar
Homework Statement
I think the ans should about 27-29m/s2