1) If you increase the distance that a satellite is orbiting above the surface o
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Question
1) If you increase the distance that a satellite is orbiting above the surface of the earth, then its velocity for a stable orbit willincrease.
decrease.
remain the same.
You can not tell from the information given.
2) In Example 11-3, the author finds a period of approximately 92 minutes of a stable circular orbit of the ISS at an altitude of 385km. How could you have a stable circular orbit at that same altitude but double the period to 184 minutes?
cut the mass of the ISS in half
double the mass of the ISS
cut the velocity of the ISS in half
double the velocity of the ISS
It is impossible to have a stable circular orbit at that altitude with a period of 184 minutes.
3) Equation 11-2 is correct when
the mass, M, is very large.
the mass, m, is very large.
the potental energy is set to zero when r is infinity
both (a) and (b)
4) In the CHECK portion of Example 11-4, the author points out that the altitude, h, calculated is greater than the altitude we would have gotten by using ?U=mgh. The reason we could not use the mgh formula in this case is because
we did not know the mass.
that formula works for only relatively small masses.
that formula works only when the force due to gravity is relatively constant.
that formula does not apply in this case because it does not include the gravitational attraction of the sun and moon.
5) In Example 11-4, what happens to the mechanical energy of the earth-projectile system as the rocket moves away from the earth?
It is constant.
It increases.
It decreases.
You can not tell from the information given.
6) If you increase the distance that a satellite is orbiting above the surface of the earth, then the time it takes to orbit the earth will...
increase.
decrease.
remain the same.
depend on the mass of the satellite.
7) The perihelion of a planet's orbit
is when the planet is farthest away from the sun.
is closest to the sun.
when the planet moves through one of the foci of the ellipse.
when the planet's orbit is co-planar with another planets orbit.
8) In example 11-2, the author calculates the acceleration due to the earth's gravity at the altitude of the space shuttle to be 8.70 m/sec2. How can there be a non-zero acceleration due to the earth's gravity in the space shuttle and yet we see pictures of the astronauts floating around inside the shuttle, appearing weightless?
The author's calculation did not include the gravitational attraction from the moon.
The author's calculation did not include the gravitational attraction from the sun.
The author's calculation did not include the mass of the space station.
The astronauts and the space station are accelerating downwards at the same rate.
(a) and (b)
(a) and (c)
9) For a satellite moving in a stable circular orbit, how are its kinetic energy and total mechanical energy related?
The greater the kinetic energy, the greater the total mechanical energy.
The greater the kinetic energy, the lower the total mechanical energy.
The mechanical energy and the kinetic energy are not related in any specific way.
The mechanical energy and the kinetic energy are related, but you need to know the mass of the satellite.
10) How is the escape velocity of a satellite and its mass related?
The greater the mass, the greater the escape velocity.
The greater the mass, the smaller the escape velocity.
The escape velocity may get bigger or smaller with increasing mass, depending on the radius of the satellite.
The escape velocity of a satellite does not depend on its mass.
Explanation / Answer
1) decreases 2)It is impossible to have a stable circular orbit at that altitude with a period of 184 minutes. 3) equation 11-2 is not given. 4)that formula works only when the force due to gravity is relatively constant 5)It is constant. 6)increase. 7)is closest to the sun. 8)The astronauts and the space station are accelerating downwards at the same rate. and The author's calculation did not include the mass of the space station. 9)The greater the kinetic energy, the lower the total mechanical energy. 10)The escape velocity of a satellite does not depend on its mass.
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