posted by Sam on .
A projectile is launched from ground level to the top of a cliff which is 195 m away and 155 m high. If the projectile lands on top of the cliff 9.2 s after it is fired, find the initial velocity of the projectile (magnitude and direction). Neglect air resistance. Also calculate the angle
Well, you have some algebra ahead.
you are given t.
So you have two equations, two unknowns.
Here is what I suggest. Put both equations in the form of
then square both sides.
add the equations, you should get something like this:
V^2(cosTheta ^2 + sinTheta ^2)=number^2
well, you know the ( ) is 1, which allows you to solve for V. Then substitute back to solve for theta.