A disk 7.98 cm in radius rotates at a constant rate of 1 250 rev/min about its central axis. (a) Determine its angular speed. rad/s (b) Determine the tangential speed at a point 3.10 cm from its center. m/s (c) Determine the radial acceleration of a point on the rim. magnitude km/s2 direction (d) Determine the total distance a point on the rim moves in 1.90 s. m

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Answer with Explanation:We are given that

Radius of disk=r=7.98 cm=0.0798 m

1 m=100 cm

a.Angular speed=1250rev/min

rad=1 rev

rad/min

1 min=60 sec

Angular speed=

Angular speed=b.r=3.1 cm=

1 m=100 cm

Hence, the tangential speed=

4.058m/sc.Radial acceleration=

Hence, the radial acceleration of a point on the rim=

d.Time, t=1.9 s

Total distance=