Unlike the older vinyl records which rotated at a constant ω of 33.3 rotations per minute (rpm), compact disks vary their rotation speed during the playing period. a certain cd has a diameter of 12cm and a playing time of 77 minutes. when the music starts, the cd is rotating at 480 rpm. at the end of the music, the cd is rotating at 219 rpm.
1) what is the final rotational velocity of a point on the very outer edge of the disk?
2) what is the final rotational velocity of a point that is half way between the center of the disk and the outer edge?
3) what is the final tangetial speed of a point on the very outer edge of the disk?
4) what is the final tangential speed of a point half way between the center of the disk and its
5) what is the magnitude of the average angular acceleration of the disk during this playing period?

Learning goal: to understand newton's 1st law. newton's principia states this first law of motion: an object subject to no net force maintains its state of motion, either at rest or at constant speed in a right line. this law may be restated as follows: if the sum of all forces acting on an object is zero, then the acceleration of that object is zero. mathematically this is just a special case of the 2nd law of motion, f⃗ =ma⃗ , when f⃗ =0. when studying newtonian mechanics, it is best to remember the 1st law in two ways: if the net force (i.e., sum of all forces) acting on an object is zero, the object will keep moving with constant velocity (which may be zero). if an object is moving with constant velocity, that is, with zero acceleration, then the net force acting on that object must be zero. complete the following sentences to see if you can apply these ideas. part a if a car is moving to the left with constant velocity, one can conclude that