Pre cal.
posted by Patrick on .
Determine the linear velocity of a point rotating at 25 revolutions per minute at a distance of 2 feet from the center of the rotating object. Give answer in feet/sec/
25/60 = 5/12 revs per second
Convert rev per second to rad/sec
5/12*2*pi = 2.618 rad/sec
at a distance of 2 feet:
2*2.618 = 5.236 feet/sec

arc length = r(theta)
a = 2(theta)
da/dt = 2d(theta)/dt
= 2(2.618) = 5.236 feet/sec
you are correct