The spin dryer of washing machine rotating at 15 rps slows down to 5 rps after making 50 rotations. Find the its angular acceleration.

Explanation

Data : ` f_(0) = 15 Hz, f = 5 Hz, theta = 50 " rot " =50 xx 2 pi " rad" `
The angular acceleration `prop (omega^(2)-omega_(0)^(2))/(2theta) = ((2pif)^(2) - (2pi f_(0))^(2))/(2 theta) `
` = (4pi^(2)(5^(2)-15^(2)))/(2(1100pi))`
` (2pi)/(100) (-200) = - 4 xx 3.142`
`= -12.568 " rad/s"^(2)`