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1irishman
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Homework Statement
A projectile is launched from the top of a cliff with an initial velocity of 20m/s at 30deg. above the horizontal. It hits the ground 3.0s later. Given projectile range is 52m and height is 14.1m, how do i calculate it velocity(magnitude and direction) 0.1s before it hits the ground?
Homework Equations
d=vit+1/2at^2
vf=vi+at
The Attempt at a Solution
I already calculated the range and the height, but i don't know how to do the velocity before it hits the ground based on those figures in the question. Please hints? Do i have to draw another triangle for the landing and use a new value for time or something?