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1.) Projectile:
At t = 0, an object is projected with a speed v0 = 45 m/s at an angle q0 = 21.8° above the
horizontal. The axes on the diagram show the x and y directions that are to be considered positive.
For parts ag, calculate the requested quantities at t = 10 s into the flight. (Use 9.81 m/sec2 for g.)
a) The vertical acceleration of the object:
ay =
m/s2
*
9.81
OK
b) Its horizontal acceleration:
ax =
m/s2
*
0
OK
c) Its vertical velocity:
vy =
m/s
*
81.38
OK
d) Its horizontal velocity:
vx =
m/s
e) The angle to the horizontal at which the object is traveling (an angle above the horizontal should be
reported as a positive number; an angle below the horizontal should be reported as a negative number).
Please give your answer in degrees:
angle =
°
f) Its vertical displacement, from where it started:
y =
m
g) Its horizontal displacement, from where it started:
x =
m
h) At what time does the object reach its maximum height?
ty, max =
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 Summer '10
 MORAN

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