Question

Velocity-time (v-t) graph for a moving object is shown in the figure. Total displacement of the object during the time interval when there is non-zero acceleration and retardation is

• A. 60 m
• B. 50 m
• C. 30 m
• D. 40 m

Answer 1

The correct option is B 50 m

Between time interval 20 sec to 40 sec, there is non-zero acceleration and retardation. Hence distance travelled during this interval
= Area between time interval 20 sec to 40 sec
$=\frac{1}{2}\times 20\times 3+20\times 1=30+20=50$