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Problem
Problem
A projectile is fired from the origin with a velocity
v
0
v_0
v
0
at an angle
θ
\theta
θ
with the
x
x
x
-axis. The speed of the projectile at an altitude
h
h
h
is a.
v
0
cos
θ
v_0 \cos \theta
v
0
cos
θ
b.
v
0
2
−
2
g
h
\sqrt{v_0^2 - 2gh}
v
0
2
−
2
g
h
c.
v
0
2
sin
2
θ
−
2
g
h
\sqrt{v_0^2 \sin^2 \theta - 2gh}
v
0
2
sin
2
θ
−
2
g
h
d. None of these
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