Question:
A particle starts from the origin goes along the X-axis to the point $(20 \mathrm{~m}, 0)$ and th32en returns along the same line to the point $(-20 \mathrm{~m}, 0)$. Find the distance and displacement of the particle during the trip.
Solution:
Distance travelled $=20+40=60 \mathrm{~m}$
Displacement $=20 \mathrm{~m}$ in the negative direction