According to a recent finding, it would appear that 70 million years ago, the Earth was spinning a bit more rapidly than it is today, and the day was 30 minutes shorter than it is now. What has been the magnitude of the Earth's average angular acceleration over the past 70 million years? 1.55 x 102 rad/s2 1 6.09 x 10 21 rad/s? 3.18 x 1022 rad/s2 3. 7.05 x 1022 rad/s? 4

A Ferris wheel rotating at 25 rad/s slows down with a constant rate of magnitude 3.7 rad/s2. How many revolutions does it make before coming to a stop? Express your answer to 1 decimal place.

A large spherical gas cloud of radius = 5 x109 km has a mass = 2.4 x1030 kg, and is spinning to make one revolution in 60 years (i.e. Earth years, each of 365 days of 24 hours each). Due to gravity, the cloud gets smaller to a radius = 1.2 x106 km. What will be its period of rotation in minutes?

You are at a playground with a merry-go-round, which is initially sitting still.  You push on it, causing it to accelerate in the angle at a rate of 1.2 rad/s2.  If you push for 3 seconds How many radians will the merry-go-round have turned through during that time?

At t = 0s a grinding wheel has an angular velocity of 24.0 rad/s. It has a constant angular acceleration of 30.0 rad/s2 until a circuit breaker trips at t = 2.3 s. From then on it coasts to a stop over the next 10.0 seconds at constant angular acceleration. Through what total angle did the grinding wheel rotate? (Give your answer in radians.)

A computer hard disk starts from rest, then speeds up with an angular acceleration of 190 rad/s2 until it reaches its final angular speed of 7,200 rmp (revolutions per minute).  How many revolutions has the disk made 10.0 s after it starts up?  Do not enter units.  Don't forget to convert rad/s to rev/s.  A sketch of angular velocity versus time will help you solve this problem.  Treat rev/s just as you would m/s.

A rotating disk is initially spinning at w = 6rev / s , slows down and stops in 19.7 . What is the magnitude of the disk's average angular acceleration? (in rev/s^ ^ 2)

An optical disk drive in your computer can spin a disk up to 10,000 rpm (about 1045 rad/s1045 rad/s). If a particular disk is spun at 734.1 rad/s734.1 rad/s while it is being read, and then is allowed to come to rest over 0.368 seconds0.368 seconds, what is the magnitude of the average angular acceleration of the disk?   If the disk is 0.12 m0.12 m in diameter, what is the magnitude of the tangential acceleration of a point 1/71/7 of the way out from the center of the disk?

a) What is the period of rotation of Venus in seconds? (The period of rotation of Venus in hours is 5,832.5 hr.) Answer in seconds    (b)What is the angular velocity (in rad/s) of Venus? (Enter the magnitude.)  Answer in rad/s   (c) Given that Venus has a radius of 6.1 ✕ 106 m at its equator, what is the linear velocity (in m/s) at Venus's surface? (Enter the magnitude of the linear velocity at the equator.) Answer on m/s

A ball travels in uniform circular motion with a Period of 2 seconds. What is the tangential velocity of the object if it is moving in a circle of radius 2 m? 2π m/s m/s 4π m/s 2 m/s 4 m/s