Unit 2c Projectile Motion Physics Worksheet Page 28
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2945. A disgruntled Japanese fast food operator hurls an Egg McMuffin off a cliff of height
h, velocity v and its initial angle 0.
a) What are its initial v
and v
?
x
y
b) How long is it in the air? (x and y variables)
c) How far from the base of the cliff does it land?
46. A projectile is fired vertically up at 35 m/sec. How long will it take the reach the
height of 40 m?
+
2
– 4ac
Hint- you need to use the quadratic formula:
t= -b
b
2a
47. A projectile is fired up at 27 m/sec. How long will it be in the air if a bird catches it in
mid air, while it’s falling, 25 m from the ground?
48. A ball on a cliff is thrown vertically down at 12 ft/sec. If the cliff is 77 ft high, how
long will it take to hit the ground?
49. A call is thrown up at 19 ft/sec off the same 77 ft high cliff. How long will it take to
reach the bottom?
50. This time the ball is thrown off the edge of the cliff at 40 ft/sec, 28 above the
horizontal. How long will its take to reach the ground? (The cliff is still 77 ft high)
51. Now a ball is fired at 37 m/sec, 41 above the horizontal, up onto a cliff that is 26 m
high. How far does it travel horizontally?
52. Finally, a ball is fired at 67 above the horizontal onto a cliff 38 m high, with an
initial velocity of 32 m/sec. How far does it move horizontally?
53. A bridge is h above the round. How long will it take a rock to fall if it’s released from
the rest of the bridge? (gravity is –g)
a) How long will it take if thrown down at velocity –v
?
o
b) How long will it take if thrown up at v
?
o
54. A rock is thrown at velocity v
at angle 0 on level ground.
o
a) What is its initial vertical velocity?
b) How long will it remain in the air?
c) How far will it get before hitting the ground?
28
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