Transcript Projectile Motion

Projectile Motion
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http://www.youtube.com/watch?v=i0me1ta
vPKY&feature=related
Projectile motion
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http://www.youtube.com/watch?NR=1&v=
TNi0Jdmz9Jk
PRACTICE
Review sample problem 3D, p. 101
 Practice 3D, p. 102, problems 1 - 4
Answers :
1. 0.66 m/s
2. 4.9 m/s
3. 7.6 m/s
4. 5.6 m
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Problems 1 – 4, p. 102
1.
2.
An autographed baseball rolls off of a
0.70 m high desk and strikes the floor
0.25 m away fro the base of the desk.
How fast was it rolling?
A cat chases a mouse across a 1.0 m
high table. The mouse steps out of the
way, and the cat slides off the table and
strikes the floor 2.2 m from the edge of
the table. What was the cat’s speed
when it slid off the table?
(cont.)
3.
4.
A pelican flying along a horizontal path
drops a fish from a height of 5.4 m. The
fish travels 8.0 m horizontally before it
hits the water below. What is the
pelican’s initial speed?
If the pelican in item 3 was traveling at
the same speed but was only 2.7 m
above the water, how far would the fish
travel horizontally before hitting the water
below?
Additional practice if needed
34/115 The fastest recorded pitcher in major League
Baseball was thrown by Nolan Ryan in 1974. If this pitch
were thrown horizontally, the ball would fall 0.809 m
(2.65 ft) by the time it reached home plate, 18.3 m (60 ft)
away. How fast was Ryan’s pitch? (45.1 m/s)
36/115 A person standing at the edge of a seaside cliff
kicks a stone over the edge with a speed of 18 m/s. The
cliff is 52 m above the earth’s surface. How long does it
take for the stone to fall to the water? (3.3 sec) With
what speed does it strike the water? (36 m/s)
Projectile Motion Project
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Due Date:
http://www.youtube.com/watch?v=r5QWISz93k
http://www.youtube.com/watch?v=UksW7
DLxx8k&feature=related
Quiz: Projectiles next class