Projectile Motion

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Projectile Motion
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The Colossus RollercoasterTM
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Monkey-drop demo
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Shooter-dropper
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vo
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vo
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1 Sec.
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2 Sec.
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3 Sec.
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4 Sec.
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An ugly giant rolls a billiard ball with uniform
velocity 30 m/s across the top of his desk. The
ball rolls off the edge of the desk and lands on
the floor 120 m from the edge of the desk.
120 m
Question How high is the table?
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An ugly giant rolls a billiard ball with uniform
velocity 30 m/s across the top of his desk. The
ball rolls off the edge of the desk and lands on
the floor 120 m from the edge of the desk.
30 m/s
30 m/s
Consider the rabbit.
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An ugly giant rolls a billiard ball with uniform
velocity 30 m/s across the top of his desk. The
ball rolls off the edge of the desk and lands on
the floor 120 m from the edge of the desk.
30 m/s
30 m/s
When will the rabbit be 120 m from the table?
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An ugly giant rolls a billiard ball with uniform
velocity 30 m/s across the top of his desk. The
ball rolls off the edge of the desk and lands on
the floor 120 m from the edge of the desk.
30 m/s
30 m/s
When will the billiard ball hit the ground?
20
An ugly giant rolls a billiard ball with uniform
velocity 30 m/s across the top of his desk. The
ball rolls off the edge of the desk and lands on
the floor 120 m from the edge of the desk.
0 m/s
Now, consider a blue ball that is dropped as the
billiard ball leaves the table.
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An ugly giant rolls a billiard ball with uniform
velocity 30 m/s across the top of his desk. The
ball rolls off the edge of the desk and lands on
the floor 120 m from the edge of the desk.
0 m/s
When will the blue ball hit the ground?
22
An ugly giant rolls a billiard ball with uniform
velocity 30 m/s across the top of his desk. The
ball rolls off the edge of the desk and lands on
the floor 120 m from the edge of the desk.
At what velocity will it hit the ground?
23
An ugly giant rolls a billiard ball with uniform
velocity 30 m/s across the top of his desk. The
ball rolls off the edge of the desk and lands on
the floor 120 m from the edge of the desk.
How high is the table?
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Sample problem
36. A diver springs upward from a board that is
three meters above the water. At the instant she
contacts the water her speed is 9 m/s and her
body makes an angle of 75? with respect to the
horizontal surface of the water. Determine her
initial velocity, magnitude and direction.
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3 m
vyf2 vyo2 2 ay Dy
- 3 m
(8.7)2 vyo2 2 (-10)(-3)
vyo2 15.7
??
2.3 m/s
vyo 4 m/s