The tub of a washer goes into its spin-dry cycle, starting fromrest and reaching an angular speed of 5.0 rev/s in 8.0 s. Atthis point, the person doing the laundry opens the lid, anda safety switch turns off the washer. The tub slows to rest in12.0 s. Through how many revolutions does the tub turn duringthe entire 20-s interval? Assume constant angular accelerationwhile it is starting and stopping.
Angular speed, acceleration and displacement
Angular acceleration is defined as the rate of change in angular velocity with respect to time. It has both magnitude and direction. So, it is a vector quantity.
Angular Position
Before diving into angular position, one should understand the basics of position and its importance along with usage in day-to-day life. When one talks of position, it’s always relative with respect to some other object. For example, position of earth with respect to sun, position of school with respect to house, etc. Angular position is the rotational analogue of linear position.
The tub of a washer goes into its spin-dry cycle, starting from
rest and reaching an angular speed of 5.0 rev/s in 8.0 s. At
this point, the person doing the laundry opens the lid, and
a safety switch turns off the washer. The tub slows to rest in
12.0 s. Through how many revolutions does the tub turn during
the entire 20-s interval? Assume constant angular acceleration
while it is starting and stopping.
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