Question

A boat is moving with a velocity 3 4 ˆ ˆ i j  w.r.t the ground. The water in the river is moving with a velocity 3 4 ˆ ˆ i j  . The velocity of boat w.r.t water is [ ] a) 6 8 ˆ ˆ i j  b) 6 8 ˆ ˆ  i j c) 8 ˆj d) 6 ˆj [

Answer 1

Explanation:

Relative velocity of boat w.r.t. water: v

bw

=(3

i

^

+4

j

^

)−(−3

i

^

−4

j

^

)=6

i

^

+8

j

^