During a very quick stop, a car decelerates at 6.6m/s^2. Assume the forward motion of the car corresponds to a positive direction for the rotation of the tires(and that they do not slip on the pavement) Part A) what is the angular acceleration of its tires in rad/s^2, assuming they have a radius of .29m and do not slip on the pavement? Part B) How many revolutions do the tires make before coming to rest, given their initial velocity is 91rad/s? Part C) How long does the car take to stop completely in seconds?

2. A wheel of radius 20 cm is initially rotating at 12 rpm. It then speeds up at a constant rate, reaching a speed of 35 rpm after 3.1 seconds. a) What is the angular acceleration of the disk? b) How much does it rotate (in radians) while it is accelerating from 12 to 35 rpm?" c) What is total acceleration (in m/s?) of a point on the edge of the disk at the moment it has just started accelerating?|

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?

Problem 12: A merry-go-round is a playground ride that consists of a large disk mounted to that it can freely rotate in a horizontal plane. The merry-go-round shown is initially at rest, has a radius R = 1.3 meters, and a mass M = 241 kg. A small boy of mass m = 46 kg runs tangentially to the merry-go-round at a speed of v = 1.8 m/s, and jumps on. Randomized Variables R = 1.3 meters M = 241 kg m = 46 kg v = 1.8 m/s

A grinding wheel 0.33 m in diameter rotates at 2900 rpm . a) What is the linear speed of a point on the edge of the grinding wheel? b) What is the acceleration of a point on the edge of the grinding wheel?

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?

The wheel of an 80 cm diameter bicycle rotates at 50 rpm the moment a cyclist sees a pedestrian crossing. It applies the brake and comes to a complete stop 3 seconds later with constant deceleration during that period. Calculatea) The angular acceleration of the break.b) The number of turns made in 3 seconds.c) The angular velocity, period and frequency when the movement is UCM.d) Draw the velocity vector, the tangential acceleration vector and the normal acceleration vector for a point on the tire during braking.

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