Question

A HELICOPTER IS FLYING SOUTH WITH A SPEED OF 60KM/HR.A BIRD IS MOVING WITH THE SAME SPEED TOWARDS EAST.FIND THE RELATIVE VELOCITY OF THE HELICOPTER WITH RESPECT TO BIRD

Answer 1

Hii Dear,

◆ Answer -

Relative velocity = 60√2 kmph

◆ Explaination -

Given that helicopter and bird are travelling in south and east, their velocity vectors are perpendicular to each other.

By law of addition of vectors, relative velocity of helicopter w.r.t. bird is given by -

vhb = √(vh^2 + vb^2 + 2×vh×vb×cosθ)

vhb = √(60^2 + 60^2 + 2×60×60×cos90°)

vhb = √(2×60^2 + 2×60×60×0)

vhb = 60√2 kmph

Therefore, relative velocity of helicopter w.r.t. bird is 60√2 kmph.

Best luck...