Question

A disc spinning at the rate $27.5$ rad s is slowed at the rate $10rad{s}^{-2}$. The time after which it will come to rest is

• A. $2.75s$
• B. $5.5s$
• C. $1.25s$
• D. $3.5s$
• E. $6.2s$

Answer 1

Answer: (A)

$t=\frac{\omega }{\alpha }=\frac{27.5}{10}=2.75s$