30. A ball swings in a vertical circle at the end of a rope 1.50 m long. When the ball is 36.9° past the lowest point on its way up, its total acceleration is $(-22.5 \hat{ i }+20.2 \hat{ j }) m / s ^{2}$. At that instant, (a) sketch a vector diagram showing the components of its acceleration..

 30. A ball swings in a vertical circle at the end of a rope 1.50 m long. When the ball is 36.9° past the lowest point on its way up, its total acceleration is $(-22.5 \hat{ i }+20.2 \hat{ j }) m / s ^{2}$. At that instant, (a) sketch a vector diagram showing the components of its acceleration, (b) determine the magnitude of its radial acceleration, and (c) determine the speed and velocity of the ball.