Answer :


Given,
The object is at rest, so initial velocity is zero.
u = 0
In one second, distance travelled = 2 m
In next two seconds, distance travelled = 5 m
Total time taken(t) = 1 + 2 = 3 s
Total distance travelled(s) = 2 + 5 = 7 m
As the direction of motion is not changed, so distance = displacement.
Total Displacement = 7 m

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