At a typical bowling alley the distance from the line where the ball is released (foul line) to the first pin is 60 ft. Estimate the time it takes the ball to reach the pins after you release it, if it rolls without slipping and has a constant translational speed. Assume the ball weighs 12 lb and has a diameter of 8.5 in. (a) Use your estimate to calculate the rotation rate of the ball, in rev/s. (b) What is its total kinetic energy in joules and what fraction of the total is its rotational kinetic energy? Ignore the finger holes and treat the bowling ball as a uniform sphere.

A turntable is off and is not spinning. A 0.2 g ant is on the disc and is 5 cm away from the center. The turntable is turned on and 0.6 s later it has an angular speed of 33 rpm. Assume the angular acceleration is constant and determine the following quantities for the ant 0.3 s after the turntable has been turned on. Express all quantities using appropriate mks units. @= V= Enter a number ih units. atan = arad = a = Fnet =

A disc accelerates uniformly from 300 revolutions per minute to 600 revolutions per minute in 25 (s). What is the linear acceleration of a point on the rim of the disc, if the radius of the disc is 250 mm.

A bicycle wheel with a radius of 0.295 m is spinning clockwise at a rate of 80 rpm. a) Calculate the period of the wheel's motion. b) Calculate the centripetal acceleration of a point on the edge of the wheel if at that instant it moves westward.

When a fan is turned off, its angular speed decreases from 168 rpm to 64.0 rpm in 6.08 s.  A) what is the angukar acceleration of the fan? B) How fast the edges of the blades are moving (in m/s) at time 6.08 s, if they are 86.0 cm long?

Given:wheel, radius = 16 cmspins with angular speed 75 rev/min.Find tangential velocity of a rock on the edge of the wheel.

An electric fan is turned off, and its angular velocity decreases uniformly from 450 rev/min to 220 rev/min in a time interval of length 4.50s.  a) Find the angular acceleration α in revolutions per second per second.  b) Find the number of revolutions made by the fan blades during the time that they are slowing down in Part A.  c) How many more seconds are required for the fan to come to rest if the angular acceleration remains constant at the value calculated in Part A?

A truck with 0.420 m radius tires travels at 42 m/s. part a) What is the angular velocity of the rotating tires in radians per second?  part b) What is the angular velocity of the rotating tires in rev/min?

Question A motorcycle wheel that is exactly 1.25 m in diameter, 0.20 m thick and (30 pl Duesti 2.5 kg in mass is rotating at 60 revolutions per minute. a) What is the magnitude of the angular velocity of the motorcycle wheel, 00 in radians per second? the b) What is the magnitude of the velocity of the outermost Note: Treat motorcycle wheel (r = 62.5 cm), in m/s? tod. xis perpendicular nts c) What is the magnitude of the velocity of a point that is 30.0 cm from b) Calcu! the central axis of the motorcycle wheel, in m/s? ing at otational velocity of 0. Ais porp aler to the ita conter (Le, so the normal Iberti f od rough e) ll h o all of s k(points) 251 of shat

An object with mass 125 g is in a circular motion. If the mangitude of the centripetal force is 18N amd the angular velocity is 23.2 rad/s, what is the radius of the circular path in  the unit of meters?