Questions
A bird moves from point (1, -2) to (4, 2). If the speed of the bird is 10 m/sec, then the velocity vector of the bird is
a
5( i^−2j^ )
b
5(4i^+2j^)
c
0.6i^+0.8j^
d
6i^+8j^
detailed solution
Correct option is D
v=|v→|⋅r^=10⋅(3i^+4j^)|3i^+4j^|=10(3i^+4j^)5=6i^+8j^Talk to our academic expert!
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A vector rotated about its tail through an angle 450 in clockwise direction. Then the new vector is
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