A disk rotates about its central axis starting from rest and accelerates with constant angular acceleration. At one time it is rotating at 9.90 rev/s; 55.0 revolutions later, its angular speed is 20.0 rev/s. Calculate (a) the angular acceleration (rev/s²), (b) the time required to complete the 55.0 revolutions, (c) the time required to reach the 9.90 rev/s angular speed, and (d) the number of revolutions from rest until the time the disk reaches the 9.90 rev/s angular speed.
A disk rotates about its central axis starting from rest and accelerates with constant angular acceleration. At one time it is rotating at 9.90 rev/s; 55.0 revolutions later, its angular speed is 20.0 rev/s. Calculate (a) the angular acceleration (rev/s²), (b) the time required to complete the 55.0 revolutions, (c) the time required to reach the 9.90 rev/s angular speed, and (d) the number of revolutions from rest until the time the disk reaches the 9.90 rev/s angular speed.
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A disk rotates about its central axis starting from
rest and accelerates with constant angular
acceleration. At one time it is rotating at 9.90 rev/s;
55.0 revolutions later, its angular speed is 20.0 rev/s.
Calculate (a) the angular acceleration (rev/s²), (b) the
time required to complete the 55.0 revolutions, (c)
the time required to reach the 9.90 rev/s angular
speed, and (d) the number of revolutions from rest
until the time the disk reaches the 9.90 rev/s angular
speed.
(a) Number
(b) Number
i
IM
i
(c) Number i
(d) Number i
Unit
Unit
Unit
Unit
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