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Question:

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 to t=5s is:

115(^i+^j)

73(^i+^j)

2(^i−^j)

15(13^i+14^j)

Solution:

→rl = 2^i + 3^j
→rf = 13^i + 14^j
→s = 11^i + 11^j
<→v> = 11^i + 11^j/5