Q. 20

A particle is pro

Answer :

u = Velocity of projection

Ɵ = Angle of Projection

= Initial velocity along x axis

= Initial velocity along y axis

= Acceleration along x axis

= Acceleration along y axis

Using equations of motion:

At any instantaneous time, ‘t’ the angle that v makes with the horizontal is.

So, …3

Given that v makes angle 90° with u,






(From 5) …6


(From 5)


Now, ..8

(Putting 6,7 in 8)


Putting 5 in 9, we get:

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