Question

4 Homework Assim or RADEO) m and Due Dates Resources DIR) Aseptical disk drive in your computer can spla a disk up to 10,000 rpm (about 1045 rad/s). If a particular disk is spuna 9993 rad's while it is being read and then is allowed to come to rest over 0.234 seconds, what is the magnitude of the average angular acceleration of the disk? weggelar sceleri If the disk is 012 in diameter, what is the magnitude of the tangential acceleration of a point 1/3 of the way out from the els a ction

Answer 1

Solution) w = 939.3 rad/s

t = 0.234 s

Angular acceleration = w/t

Angular acceleration = (939.3)/(0.234)

Angular acceleration = 4014.1 rad/s^2

Diameter d = 0.12 m

Radius r = (d/2) = (0.12/2) = 0.06 m

At point r' = (r)(1/15)

r' = (0.06)(1/15) = 0.004 m

Tangential acceleration = (r')(angular acceleration)

Tangential acceleration = (0.004)(4014.1)

Tangential acceleration = 16.05 m/s^2