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Question

A particle is at x=+5 m at t=0, x=−7 m at t=6 s and x=+2 m at t=10 s. The average velocity of the particle during the intervals:
(a) t=0 to t=6 s
(b) t=6 s to t=10 s
(c) t=0 to 10 s
is respectively :

A
2 ms1,2.25 ms1,0.3 ms1
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B
2 ms1,2.25 ms1,0.3 ms1
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C
0.3 ms1,0.3 ms1,2 ms1
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D
2.25 ms1,0.3 ms1,2 ms1
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Solution

The correct option is A 2 ms1,2.25 ms1,0.3 ms1
Vavg(0 to 6)=x2x1t2t1=7(5)60=126=2 m/s

Vavg(6 to 10)=x3x2t3t2=2(7)106=94=2.252 m/s

Vavg(0 to 10)=x3x1t3t1=25100=310=0.3 m/s

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