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Unformatted text preview: 3 rad/s. How long before they meet? 6. A fan blade starts from rest and makes 4 rotations about its center point that has a radius of0.25 m. It takes 10 seconds to reach its maximum speed before it reaches maximum cooling. a. What is the arc length of the fan blade? b. What is the angular velocity of the blade? c. What is the angular acceleration of the blade? 7.What is the center of gravity of an arm: Upper arm is 17 N and the center of upper arm is 0.13 from shoulder. Lower arm is 11 N and center of lower arm is 0.38 m from shoulder. Hand is 4.2 N and middle is 0.61 m from shoulder. 8. A dentist causes a the bit of a high speed- drill to accelerate from an angular speed of 1.05 x 10^4 rad/s to an angular speed of 3.14 x 10^4 rad/s. In the process the bit turns through 1.88 x10^4 rad. Assuming a constant acceleration how long would it take the bit to reach its maximum speed of 7.85 xa0^4 rad /s from rest?...
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This note was uploaded on 02/06/2011 for the course PHY 201 taught by Professor Jschesinger during the Spring '09 term at Bunker Hill.
- Spring '09