multiple-concept example 7 explores the approach taken in problems such as this one. the blades of a ceiling fan have a radius of 0.380 mm and are rotating about a fixed axis with an angular velocity of 1.50rad/s 1.50rad/s . when the switch on the fan is turned to a higher speed, the blades acquire an angular acceleration of 2.00rad/s2 2.00rad/s2 . after 0.500 ss the blades acquire an angular acceleration of 2.00rad/s2 2.00rad/s2 . after 0.500 ss has clapsed since the switch was resct, what is (a) the total acceleration (in m/s2)m/s2) of a point on the tip of a blade and (b)(b) the angle ϕϕ between the total acceleration a→a→ and the centripetal acceleratio