Q.

A particle is moving such that its position coordinates (x,y) are (2m,3m) at time t = 0 (6m,7m) at time t=2s and (13m,14m) at time t=5s. Average velocity vector Vav from t=0 and t=5s is 

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a

13(13i^+14j^)

b

73(i^+j^)

c

2(i^+j^)

d

115(i^+j^)

answer is D.

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Detailed Solution

 Average velocity =rfritfti.

=11i^+11j^5m/s

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A particle is moving such that its position coordinates (x,y) are (2m,3m) at time t = 0 (6m,7m) at time t=2s and (13m,14m) at time t=5s. Average velocity vector V→av from t=0 and t=5s is