Question

The figure shows the angular velocity versus time graph of a flywheel. The angle, in radians through which the flywheel turns during 25 s is

A. 120
B. 480
C. 600
D. 750

Answer 1

Correct Answer - C
Angular rotated, `theta=` area under `omega-t` graph
area under `omega-t` graph = area of trapezium OABCO.
`because` of (OABCO) `= (1)/(2)` (Sum of parallel sides) `xx` distance between them

`=(1)/(2)(AB+OC)xxAD=(1)/(2)(15+25)xx30=600`.