Question

A fly wheel is turning at 180 per/min find the number of revolution made

before it stops of it slows at 2

$\pi \: rad \ \: \ \:$
rad / s

1*) 9
2) 18
3) 3
4) 12
please answer me please​

Answer 1

Answer:

Other researchers believe he was born later, even as late as 448 B.C. And some Buddhists believe Gautama Buddha lived from 563 B.C. to 483 B.C. But virtually all scholars believe Siddhartha Gautama was born in Lumbini in present-day Nepal. He belonged to a large clan called the Shakyas.

Answer 2

Answer:

$initail \: angular \: velocity \: = wi \\ \\ final \: angular \: velocity \: = \: wf \: \\ \\ angular \: acceleration \: = \: a \\ \\ distance \: = \: s \\ \\ \\ wi\: = \frac{2\pi(rpm)}{60} \\ \\ w \: i \: = \frac{2\pi \times180}{60} \\ \\ wi \: = \: 6\pi \\ \\ also \\ wf = 0 \\ a = \: \pi \: rad \div {second}^{2} \\ \\ using \\ {wf}^{2} - \: {wi}^{2} = 2as \\ \\ = > {0}^{2} - \: {(6\pi)}^{2} = \: 2(\pi)s \\ \\ = > 36 {\pi}^{2} = 2 \pi \: s \\ \\ = > s \: = \: \frac{36 {\pi}^{2} }{2\pi} \\ \\ = > s \: = 18\pi \\ \\ number \: of \: rotation \: = \: \frac{s}{2\pi} \\ \\ number \: of \: rotation \: = \frac{18\pi}{2\pi} \\ \\ number \: of \: rotation \: = 9$