Questions
A ship ‘A’ steams down to North at 8 kmph, and ship ‘B’ due west at 6 kmph. Relative velocity of B w.r.t. A is
a
10 kmph
b
25 kmph
c
6 kmph
d
20 kmph
detailed solution
Correct option is A
V¯A=8j,VB=−6i ∴V¯BA=V¯B−V¯A=−6i−8j|V¯BA|=(6)2+82=100=10kmphTalk to our academic expert!
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A body which has a speed of 5km/hr in still water crosses a river of width 1km along the shortest possible path in 15minutes. The velocity of the river water in km/hr is
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