First slide

Position Path Length (Distance) And Displacement

Question

A particle starts from the origin, goes along the x-axis to the point (20m, 0) and then returns along the same line to the point (–20 m, 0).The distance and displacement of the particle during the trip are

Moderate

A

60m, –20m
B

40m, –40m
C

40m, 40m
D

80m, 40m

Solution

Distance covered by the particle = OA + AB ⇒ (20 + 40)m = 60m
Displacement = OA - AB = OA - (AO + OB) ⇒ -OB = -20m

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