PHYS 1301W Lecture 1: Uniform Circular Motion

The large blade of a helicopter is rotating in a horizontal circle.The length of the blade is 6.5 m, measured from its tip to thecenter of the circle. Find the ratio of the centripetalacceleration a1 at the end of the blade to the centripetalacceleration a2 which exists at a point located 4.0 m from thecenter of the circle.
a1/a2=

a point on the rain of a 0.25m radius wheel has a centripetalacceleration of 4m/s/s, what isthe rotional velocity?