Workbook Chapter 7b
Alps iv-1
1
Alps iv-2
Impulse
- Momentum Question 3
(a) A ball hits a wall as shown at the
right. In which direction is the
impulse of the wall on the ball?
(b) In which direction is the impulse of
the ball on the wall?
(c) How do the magnitudes of the two
impulses compare ? Justify your
answer.
Alps iv-3
Alps iv-4
Alps iv-5
Alps iv-6
Paul
DÕAlessandrisÕ Momentum
Conservation Problems
Momentum Conservation
- 4
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In the farthest reaches
of deep space, an 800 kg spaceship, including contents, is traveling at 1300
m/s. The spaceship recoils after
it launches a 60 kg scientific probe into space with a speed of 300 m/s
relative to the fixed, distant stars.
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Momentum Conservation
- 5
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In the farthest reaches
of deep space, an 800 kg spaceship, including contents, is traveling at 1300
m/s. The spaceship recoils after
it launches a 60 kg scientific probe into space with a speed of 300 m/s relative
to the spaceship.
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Momentum Conservation
- 6
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In the farthest reaches
of deep space, an 800 kg spaceship, including contents, is traveling at 1300
m/s. The spaceship recoils after
it launches a 60 kg scientific probe into space. After launching the probe, the spaceship is at rest.
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Momentum Conservation
- 10
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A 140 kg astronaut is
standing on the extreme edge of a stationary 1000 kg space platform. He walks at a constant speed of 5 m/s,
with respect to the fixed stars, toward the other edge of the platform. (He wears special magnetic shoes which
allow him to walk along the metal platform.) As he walks, the platform moves through space.
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Momentum Conservation
- 11
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A 140 kg astronaut is
standing on the extreme edge of a stationary 1000 kg space platform. He walks at a constant speed of 5 m/s, with
respect to the platform, toward the other edge of the platform. (He wears special magnetic shoes which
allow him to walk along the metal platform.) As he walks, the platform moves through space.
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Momentum Conservation
- 12
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A 70 kg student is
hanging from a 150 kg helium balloon (including basket and mass of
helium). The balloon is rising at
a constant speed of 8 m/s. The
ÒliftÓ on the balloon due to the buoyant force is constant. The student begins to climb up the rope
at a speed of 15 m/s as measured by an earthbound observer. The balloon's upward speed is decreased
as the student climbs.
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Momentum Conservation
- 13
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A 70 kg student is
hanging from a 150 kg helium balloon (including basket and mass of
helium). The balloon is rising at
a constant speed of 8 m/s. The
ÒliftÓ on the balloon due to the buoyant force is constant. The student begins to climb up the rope
at a speed of 15 m/s as measured from the balloon. The balloon's upward speed is decreased
as the student climbs.
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Momentum Conservation
- 14
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Two astronauts, one 140
kg and the other 170 kg, are standing on opposite edges of a stationary 1000 kg
space platform. They walk at
constant speeds of 5 m/s, with respect to the platform, toward the other edge
of the platform. (They wear
special magnetic shoes which allow them to walk along the metal platform.) As they walk, the platform moves through
space.
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Momentum Conservation
- 19 Center of Mass
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A 140 kg astronaut is
standing on the extreme edge of a stationary 1000 kg, 20 m long space
platform. He walks at a constant
speed of 5 m/s, with respect to the platform, toward the other edge of the
platform. (He wears special
magnetic shoes which allow him to walk along the metal platform.) As he walks, the platform moves through
space. When he stops at the other
edge, the platform is not in itÕs original position.
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Momentum Conservation
- 20 Center of Mass
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A 70 kg student is
hanging from a 150 kg helium balloon (including basket and mass of
helium). The balloon is
stationary. The ÒliftÓ on the
balloon due to the buoyant force is constant. The student begins to climb up the rope. The balloon moves downward. The rope is 10 m long, and the student
climbs safely to the top.
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Momentum Conservation
- 21 Center of Mass
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Two astronauts, one 140
kg and the other 170 kg, are standing on opposite edges of a stationary 1000
kg, 25 m long space platform. They
walk toward the other edge of the platform. (They wear special magnetic shoes which allow them to walk
along the metal platform.) As they
walk, the platform moves through space. The platform is not in itÕs original
position when they finish their maneuver.
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