A bird moves from point (1m,−2m,3m) to (4m,2m,3m). If the speed of the bird is 10m/s, then the velocity vector of the bird in m/s is:
5(ˆi−2ˆj+3ˆk)
5(4ˆi+2ˆj+3ˆk)
0.6ˆi+0.8ˆj
6ˆi+8ˆj
The correct Answer is:D
ˆv=(4−1)ˆi+(2+2)ˆj+(3−3)ˆk√(4−1)2+(2+2)2+(3−3)2=35ˆi+45ˆj
→v=(10)(35ˆi+45ˆj)=6ˆi+8ˆj
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