Question

The angular velocity of a fly wheel increases from $0$ to $40rad/s$, in $8$ seconds. What is its total angular displacement in this time?

• A. $80rad$
• B. $160rad$
• C. $200rad$
• D. $120rad$

Answer 1

The correct option is B $160rad$

the angluar displacement is given by $\theta =\frac{\omega \ast time}{2}=\frac{(40-0)\ast 8}{2}=160rad$