For the motion shown in the figure, find the displacement of car between the time intervals { t }_{ 1 } and

{ t }_{ 3 }.

A car moving towards -t-x-axis. At time ${ t }*{ 1 }$ it is at +20 m. It turns at + 50 m and starts moving towards x-axis. At time
${ t }*{ 3 }$, it reached at 30 m.

The displacement of car in the interval (

${ t }_{ 3 }$ —t1 )= At is - 30 -(+ 20) = -50 m (negative sign shows the direction of displacement is towards —x-axis).