A particle is constrained to move on a straight line path. It returns to starting point after 10, se

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2.Motion in Straight Line

easy

A particle is constrained to move on a straight line path. It returns to the starting point after $10\, sec$. The total distance covered by the particle during this time is $30\, m$. Which of the following statements about the motion of the particle is false

A

Displacement of the particle is zero

B

Average speed of the particle is $ 3\, m/s$

C

Displacement of the particle is $30\, m$

D

Both (a) and (b)

Solution

(c) Displacement of the particle will be zero because it comes back to its starting point

${\rm{Average\, speed }} = \frac{{{\rm{Total \,distance }}}}{{{\rm{Total\, time }}}} = \frac{{30m}}{{10\;sec}} = 3\;m/s$

Standard 11

Physics

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