The hour hand of a huge clock is 100cm long. What is the circumferential speed of the tip of this hand in cm/hr.?

The crankshaft in a race car goes from rest to 3000 rpmrpm in 3.5 ss. What is the angular acceleration of the crankshaft? How many revolutions does it make while reaching 3000 rpmrpm?

A flywheel 1.2 m in diameter accelerates uniformly from rest to 2000 rpm in 20 sec. What is its angular acceleration?

An electric food processor comes with many attachments forblending and slicing food. Assume the motor maintains thesame angular speed for all the various attachments. The largestattachment has a diameter of 12.0 cm, and the smallest has a diameter of 5.00 cm. Find the ratio of the translational speeds of points on the edges of each attachment.

A gyroscope slows from an initial rate of 32.0 rad/s at a rate of 0.700 rad/s2. (a) How long does it take to come to rest? (b) How many revolutions does it make before stopping?

A compact disc rotates at 500 rev/min. If the diameter of the disc is 120 mm, (a) what is the tangential speed of a point at the edge of the disc? (b) At a point halfway to the center of the disc?

A proton is accelerated in a cyclotron to 5.0106m/s in 0.01 s. The proton follows a circular path. If the radius of the cyclotron is 0.5 km, (a) What is the angular momentum of the proton about the center at its maximum speed? (b) What is the torque on the proton about the center as it accelerates to maximum speed?

El sistema mostrado en la figura tiene un peso de 2177 N cuyo peso actua en el punto G mostrado en la figura. 0=60 1.1 m G 1.75 m 0.7 m Determine la componente horizontal Ax que actua sobre el pin en A No use números negativos en la contestación.

50 radians are equal to how many degrees?

An 8.0-cm diameter hard disk spinning at 7200 rpm can stop in 19 revolutions.   a) What is the magnitude of the angular acceleration? Express your answer in radians per second squared.  b) How long does it take the disk to come to a halt? Express your answer with the appropriate units.