Two points are located on a rigid wheel that is rotating withdecreasing angular velocity about a fixed axis. point a islocated on the rim of the wheel and point b is halfway between therim and the axis. which one of the following statements concerningthis situation is true?
both points have the same centripetal acceleration.
both points have the same tangential acceleration.
the angular velocity at point a is greater than that of pointb.
both points have the same instantaneous angular velocity.
each second, point a turns through a greater angle than pointb.

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?