When at rest on the launching pad, the force of gravity on the space shuttle is quite huge

1
When at rest on the launching pad, the force of
gravity on the space shuttle is quite hugethe
weight of the shuttle. When in orbit, some 200 km
above Earths surface, the force of gravity on
the shuttle is
1. nearly as much.2. about half as much.3.
nearly zero (micro-gravity).4. zero.
(Neglect changes in the weight of the fuel
carried by the shuttle.)
2
1. nearly as much.2. about half as much.3.
nearly zero (micro-gravity).4. zero.
When at rest on the launching pad, the force of
gravity on the space shuttle is quite hugethe
weight of the shuttle. When in orbit, some 200 km
above Earths surface, the force of gravity on
the shuttle is
(Neglect changes in the weight of the fuel
carried by the shuttle.)
3
Consider a giant flat plate that touches the
Earth at one point and extends out into space.
Suppose you slide an iron block along the plane,
where it makes contact with the Earth.Suppose
also that the plate is perfectly frictionless,
air drag is absent, and vo lt vescape. The block
will
1. continue at constant velocity, in accord with
the law of inertia.2. increase in speed as the
force of gravity on it weakens with
distance.3. decrease in speed due to the pull of
gravity.4. oscillate to and fro.
4
1. continue at constant velocity, in accord with
the law of inertia.2. increase in speed as the
force of gravity on it weakens with
distance.3. decrease in speed due to the pull of
gravity.4. oscillate to and fro.
Consider a giant flat plate that touches the
Earth at one point and extends out into space.
Suppose you slide an iron block along the plane,
where it makes contact with the Earth.Suppose
also that the plate is perfectly frictionless,
air drag is absent, and vo lt vescape. The block
will
5
If the Sun suddenly collapsed to become a black
hole, the Earth would
1. leave the Solar System in a straight-line
path.2. spiral into the black hole.3. continue
to circle in its usual orbit.
6
1. leave the Solar System in a straight-line
path.2. spiral into the black hole.3. continue
to circle in its usual orbit.
If the Sun suddenly collapsed to become a black
hole, the Earth would
7
Suppose the gravitational force between the Earth
and Moon was turned off and the pull replaced by
the tension in a steel cable joining them.
Consider the tension in such a cable, and its
size. The tensile strength of a steel cable is
about 5.0 ? 108 N/m (each square meter cross
section can support a 5.0 ? 108Newton force).
The cross-sectional area would be about that
of1. a bass guitar string.2. a typical vertical
cable that supports the Golden Gate Bridge.3.
the Empire State building.4. Manhattan Island,
N.Y.5. an area greater than New York State.
8
The cross-sectional area would be about that
of1. a bass guitar string.2. a typical vertical
cable that supports the Golden Gate Bridge.3.
the Empire State building.4. Manhattan Island,
N.Y.5. an area greater than New York State.
Suppose the gravitational force between the Earth
and Moon was turned off and the pull replaced by
the tension in a steel cable joining them.
Consider the tension in such a cable, and its
size. The tensile strength of a steel cable is
about 5.0 ? 108 N/m (each square meter cross
section can support a 5.0 ? 108Newton force).
9
Ocean tides are produced by the Moon. Since our
bodies aremostly water, doesnt the Moon
similarly produce tides in our bodies?
1. Yes, there are biological tides that affect
mood and behavior.2. Yes, but negligible (less
than are produced by an apple you hold over
your head).3. No, because the water in our body
isnt free to flow.
10
1. Yes, there are biological tides that affect
mood and behavior.2. Yes, but negligible (less
than are produced by an apple you hold over
your head).3. No, because the water in our body
isnt free to flow.
Ocean tides are produced by the Moon. Since our
bodies aremostly water, doesnt the Moon
similarly produce tides in our bodies?
11
Would observers on the Moon see the Earth rise
and set, as we here on Earth see the Moon rise
and set?
1. Yes2. No
12
1. Yes2. No
Would observers on the Moon see the Earth rise
and set, as we here on Earth see the Moon rise
and set?