<p>Active Learning: Rotational Kinematics rev, 5/12</p><p>I Rotational Kinematics</p><p>1. A rotor starts from rest and accelerates with constant angular acceleration to 30 rpm CW in 12 revolutions. </p><p>A. What is the final angular velocity in standard units?</p><p>B. What is the angular acceleration?</p><p>C. How many seconds did it take to come up to speed?</p><p>2. The angular velocity of a rotating disk varies with time according to</p><p>A. How many revolutions are completed in 10 seconds? B. What is the angular acceleration at 10 seconds?</p><p>B</p><p>A</p><p>II Angular versus Tangential Motion 1. Consider the two points A and B on a disc (R = 10 cm) that is rotating CCW (RA = 3 cm, RB = 8 cm) . </p><p>A. Which of the following statements are true (there may be more than one)? (Consider magnitudes only)</p><p> a. ωA > ωB c. ωA < ωB e. ωA = ωB</p><p> b. vA > vB d. vA < vB f. vA = vB Diameter = 22 cm</p><p>B. Draw velocity vectors for vA and vB. Diameter = 5 cm</p><p>Active Learning: Rotational Kinematics </p><p>2. The figure below represents a bicycle front and rear sprocket connected by a chain. The front sprocket is larger than the rear sprocket. </p><p>A. Which has the greater linear speed, the rim of the front sprocket, back sprocket or are they both equal?</p><p>B. Which has the greater rotational speed, the front sprocket, the back sprocket, or are they both the same?</p><p>3. A bicycle racer is traveling at 10 m/s with an acceleration of 0.5 m/s2. The radius of the bicycle wheel is 33 cm. </p><p>A. What is the tangential speed of a point on the rim of the bike wheel. </p><p>B. What is the angular velocity of the bicycle wheels?</p><p>C. What is the angular acceleration of the bicycle wheels?</p><p>D. What is the centripetal acceleration for a point on the rim of the wheels? </p>