Question

4. A boy travels on a straight road covers 4 km and then turn back and covers 2 km. Distance and magnitude of displacement are: *

Answer 1

Figure:-

$\setlength{\unitlength}{.5in}\begin{picture}(0,0)\thicklines\qbezier(0,0)(0,0)(4,0)\put(2,0){\circle*{0.5}}\put(-0.2,-0.4){\sf A}\put(4.2,-0.4){\sf B}\put(2,0.4){\sf C}\end{picture}$

Look at the figure

Displacement:-

$\\ \sf\longmapsto AC$

$\\ \sf\longmapsto 4km-2km$

$\\ \sf\longmapsto 2km$

Distance:-

$\\ \sf\longmapsto AB+AC$

$\\ \sf\longmapsto 4km+2km$

$\\ \sf\longmapsto 6km$