After 2 seconds of flight,the velocity of a projectile is (12i-4j)m/s,Find its speed and elevation at moment of projection?
When a projectile is projected with an initial speed of
But, the vertical component of velocity i.e
So,in vector form we can write,velocity after
So,comparing with the given equation,we can say,
Solving the above two equations we get,
Let's set t=0 at the moment of projection, and denote
Substitute the above into the y(t) equations