Answer:
Angular displacement will be 4.48 rad
So option (a) will be correct option
Explanation:
We have given initial angular acceleration [tex]\omega _i=0.5rad/sec[/tex]
Angular acceleration [tex]\alpha =0.04rad/sec^2[/tex]
Time t = 7 sec
We have to find the angular displacement
We know that angular displacement is given by
[tex]\Theta =\omega _it+\frac{1}{2}\alpha t^2=0.5\times 7+\frac{1}{2}\times 0.04\times 7^2=4.48rad[/tex]
So option (a) will be correct option