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Centripital and Tangential Acceleration

# Centripital and Tangential Acceleration - Physics 125...

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Physics 125 Discussion #15 1 Problem 1: Throwing a discus A discus thrower moves the discus in a circle of radius 80.0 cm. At a certain instant, the thrower is spinning at an angular speed of 10.0 rad/s and the angular speed is increasing at 50.0 rad/s 2 . 1. What is the tangential component of the acceleration of the discus at this time? 2. What is the centripetal component of the acceleration of the discus at this time? 3. What is the magnitude of the acceleration?

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Physics 125 Discussion #15 2 Problem 2: An electric ceiling fan An electric ceiling fan with blades 0.750 m in diameter is rotating about a fixed axis with an initial angular velocity of 0.250 rev/s. The angular acceleration is 0.900 rev/s 2 . 1. First, list all the known factors. Initial angular velocity: ω 0 = Angular acceleration: α = 2. What is the angular velocity after 0.200 s? 3. Through how many revolutions has the blade turned in this time interval? 4. What is the tangential speed of a point on the tip of the blade at t = 0.200 s? 5. What is the magnitude of the resultant acceleration of a point on the tip of the

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