How long does it take to hit the ground?
4.9t^2 = 30
Now, use that value of t to get the vertical speed vy:
vy = 20 sin60° - 9.81t
vx is a constant 20 cos60°
so at impact, the speed is √(vx^2 + vy^2)
A baseball is thrown from the roof of 30m tall building with an
initial velocity of magnitude 20m/s and directed at an angle of
60o
above the horizontal. What is the speed of the ball just
before it strikes the ground? Use the law of conservation of
energy and ignore air resistance.
pls help my quiz is ending in an hour
1 answer
1 answer