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Worksheet:
Chapters 2 and 3
OneDimensional Kinematics:
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Assume:
*
standard gravitational acceleration of 9.81 m/s
2
[D] on the Earth
*
air resistance is negligible.
The space shuttle takes off from Florida and circles the Earth several times, finally landing in
California.
While the shuttle is in flight, a photographer travels from Florida to California to take
pictures of the astronauts when they step off of the shuttle.
1)
Who undergoes the greater displacement, the astronauts or the photographer?
2)
Who traveled the greater distance, the astronauts or the photographer?
3)
Who had the larger average speed?
4)
Who had the larger average velocity?
An airplane travels from Cupertino to Phoenix in a straight line, which is a distance of 1000 km.
It travels the first 500 km at a speed of 500 km/h.
It travels the second 500 km at a speed of 250
km/h.
5)
What is the average of the two velocities?
6)
How long did the first 500 km take?
7)
How long did the second 500 km take?
8)
How long did the trip take?
9)
What is the average velocity for the trip?
10)
Is the average velocity the same as the average of the velocities?
Suppose “up” is defined as the positive direction on a baseball field.
11)
If the velocity of the ball is zero, must its acceleration be zero?
Give an example.
12)
If the ball has a positive velocity and a negative acceleration, what is happening to the velocity?
Give an example.
13)
If the ball has a positive acceleration, can its speed be decreasing?
Give an example.
A duck is swimming around a pond as you watch it.
The average velocity of the duck is zero
during a certain oneminute time interval.
14)
What can you say about the displacement of the duck during that time interval?
15)
What can you say about the average speed of the duck?
16)
What can you say about the distance it travels?
You may have heard the story about the boy who traveled through the woods, dropping
breadcrumbs every second as he walked so that he wouldn’t get lost.
(Birds ate the crumbs, so he
ended up getting lost and eaten by small rodents.)
Anyway……….
17)
What would the pattern of the breadcrumbs look like if the boy were walking at constant speed?
18)
If the crumbs seem to be spaced out at farther and farther intervals, what was the boy doing?
19)
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 Spring '10
 Phys123

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