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Question

If a particle is moving from its initial position x=5 m to a position x=11 m in 2 s along a straight line. What will be the average velocity of particle ?

A
5 m/s
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B
3 m/s
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C
3 m/s
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D
6 m/s
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Solution

The correct option is B 3 m/s
Displacement is the difference of final and initial position.
Δx=xfxi
Δx=11(5)=6 m
Hence average velocity is,
Velocityavg=ΔxΔt
Velocityavg=62
Velocityavg=3 m/s
The negative sign of average velocity indicates that particle is moving along ve xaxis.

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