Question

Velocity-time 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. `60m`
B. `50m`
C. `30m`
D. `40m`

Answer 1

(b) Total displacement of the object `=` Area `(DABCE)`
`=` Area of `Delta ABC+` Area of rectangle `(ACED)`

`=[1/2xx(40-20)xx(4-1)]+[(40-20)xx1]`
`=1/2xx20xx3+20`
`=30+20`
`=50m`