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Question

A body has an initial velocity of 4 m/s and deceleration of 4 m/s2, then what is its final velocity after traveling 2m?


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Solution

Step1: Given data

Initial velocity, u=4m/s

Deceleration, a=-4m/s2

Distance, s=2m

Step2: Formula used

The third equation of motion says,

v2=u2+2as[wherev=finalvelocity,u=initialvelocity,a=acceleartion,s=displacement]

Step3: Calculating the final velocity

v2=u2+2asv2=(4)2+2(-4)(2)v2=16-16v2=0v=0

Hence, the final velocity after travelling 2m will be 0.


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