Question

how long will it take a bullet fired from a cliff at an initial velocity of 700m per second at an angle of 30 Degree below the horizontal to reach the ground 200m below?answer
answer? are you an answer grazer?

find the horizontal and vertical components of the initial velocity.
vertical=700*sin30=350m/s
hf=hi+vi*t-4.9t^2
0=200+350*t-4.9t^2

put that quadratic in standard form
ax^2 + bx + c=0
and solve for t with the quadratic equation

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