a particle whose speed is 50m/s moves along the line from A(2,1) to B(9,25). find its velocity vector in the form of pi^+qj^
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Answer:
Displacement vector from A to B =
r
B
−
r
A
=(9−2)↑+(25−1)
j
^
Unit vector in this direction =
25
7
i
^
+
25
24
j
^
∴ Velocity vector of particle moving along this line with speed 50 mts =50×(
25
7
i
^
+
25
24
j
^
)
=14
i
^
+48
j
^
.
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