Physics Help Forum Rotational Motion
 User Name Remember Me? Password

 Advanced Mechanics Advanced Mechanics Physics Help Forum

 Mar 24th 2009, 05:22 PM #1 Junior Member   Join Date: Mar 2009 Location: New Jersey Posts: 15 Rotational Motion 1. The outer edge of a tire with radius of 45 cm has a velocity of 23 m/s. WHat is the anglar velocity of the tire? 2. A steering wheel is rotated through 128 degrees. Its radius is 22 cm. How far would a point on the steering wheel's edge move? 3. A car wheel with 9.00 cm radius rotates at 2.50 rad/s. How fast does a point 7.00 cm from the center travel? 4. A washing machine's cycles are 326 rev/min and 542 rev/min. The diameter of the drum is 0.43 m. (a) what is the ration of the cntripetal accelerations for the fast and slow spin cycles? (b) what is the ratio of linera velocity of an object on the surface of the frum for the fast and slow spin cycles? (c) find the centripetal acceleration in terms of g. 5. A centrifuge is designed to produce a centripetla acc of 0.35 x 10^6 g at a distance of 2.50 cm from the axis. What ngular velocity in rev/min is required? Thanks much
 Mar 24th 2009, 09:58 PM #2 Senior Member   Join Date: Feb 2009 Location: Singapore Posts: 206 1. use the formula w=v/r. so, angular velocity=23/0.45= 51.1 rad/s. (where w is angular velocity) 2. 128/360 x 2 x pi x 22, using the formula for circumference of a circle. 3. again use w=v/r, v=w x r=2.5 x 0.07= 0.175m/s

 Tags motion, rotational

 Thread Tools Display Modes Linear Mode

 Similar Physics Forum Discussions Thread Thread Starter Forum Replies Last Post Ellekaycee Advanced Mechanics 1 Mar 19th 2013 01:54 PM tanaki Kinematics and Dynamics 2 Sep 22nd 2009 02:33 AM angelica Advanced Mechanics 5 Mar 22nd 2009 07:01 AM hriday Advanced Mechanics 1 Jan 7th 2009 05:05 PM noppawit Kinematics and Dynamics 1 Sep 4th 2008 07:41 AM