Q. 255.0( 1 Vote )

A particle projec

Answer :

Let: u = Initial Velocity

At any instantaneous time t:


So, at any time t:

X – Axis:




Y – Axis:




Net speed at time t


Now, it is given that at t = 2s, v is minimum

Now, is always constant. Thus v can be minimum only if = zero.

At t = 2 s


Given: At t = 1 s

At t = 1 s

And also,

So, …6

Now, putting 5 in 6, we get:


Now, dividing 5 by 7, we get:

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