Question

An aeroplane is heading north east at a speed
of 141.4 ms-1. The northward component of
its velocity is​

Answer 1

An aeroplane is heading north-east at a speed of 141.4 ms-1. The northward component of its velocity is...

solution : at first, we should write vector form of velocity of aeroplane.

as it is given that, speed of aeroplane is directed to North - east. means, velocity makes an angle of 45° with the east (+x-axis)

so, velocity of aeroplane , $\vec v=141.4(cos45^{\circ}\hat{i}+sin45^{\circ}\hat{j})$

= 141.4(1/√2 i + 1/√2 j )

[ as we know, √2 = 1.414 ]

so, v = (141.4/1.414) i + (141.4/1.414)j

= 100i + 100j

hence, northward component (i.e., j) of the velocity of aeroplane is 100 m/s.

Answer 2

Answer:

aaaaàaaaaaaaaaaaaaa