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Two particles A and B are moving along x-axis. Their x-coordinate versus time graphs are as shown below. 

Two particles A and B are moving along x-axis. Their x-coordinate versus  time graphs are as shown below <img  src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/DCP_V01_CH6_E01_032_Q01.png"  width="80%"> (a) Find the time when the particles start ... (a) Find the time when the particles start ..."> (a) Find the time when the particles start ...">

Find the velocities of the two particles. 

a
vA=2.5 m/s ,vB=7.5 m/s
b
vA=2.5 m/s ,vB =7.5 m/s
c
vA = 3.75 m/s ,vB=2.75 m/s
d
vA =7.5 m/s , vB = 2.5 m/s

detailed solution

Correct option is B

v = slope of x-t graph vA=30-108m/s=2.5 m/svB=308-4m/s=7.5 m/s

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