B373 ms2 if the mass of mars is 0107 times that of

b.3.73 m/s2
If the mass of Mars is 0.107 times that of Earth, and its radius is 0.530 that of Earth,
estimate the gravitational acceleration g at the surface of Mars. (gearth = 9.80 m/s2)
a.2.5 km/s
The escape speed from the surface of the Earth is 11.2 km/s. Estimate the escape
speed for a spacecraft from the surface of the Moon. The Moon has a mass 1/81 that of
Earth and a radius 0.25 that of Earth.
b.333 N
Geosynchronous satellites orbit the Earth at a distance of 42 000 km from the Earth's
center. Their angular speed at this height is the same as the rotation rate of the Earth,
so they appear stationary at certain locations in the sky. What is the force acting on a 1
500-kg satellite at this height?
d.not given.
At an altitude of 4 times the radius of the earth, the acceleration due to gravity is
C
Suppose the gravitational potential energy for a mass at an altitude of one Earth radius
is PE1 and at two Earth radii is PE2. How do the absolute values of these potential
energies compare?
b.6.5 AU
An asteroid has a perihelion (the orbit's closest approach to the sun) of 1.5 AU and a
period of revolution of 8.0 y. What is its greatest distance from the sun (its aphelion)?
d.22.6
Two satellites are monitored as they orbit the Earth; satellite X is eight times as far from
the Earth's center as is satellite Y. From Kepler's third law one may conclude that the
period or revolution of X is what factor times that of Y?
a.nearest the Earth
At what location does an artificial Earth satellite in elliptical orbit have its greatest
speed?
b.2 km/s

An asteroid in orbit about the sun has a linear speed of 4 km/s when at a distance of
closest approach d from the sun. What is its linear speed when it is at its greatest
distance from the sun, a distance 2 d?
a.nearest the Earth
An artificial Earth satellite in an elliptical orbit has its greatest centripetal acceleration
when it is at what location?
b.greater when the orbital radius is larger
Which of the following best describes the property of the period of orbital revolution for
an Earth satellite?
a.greatest centripetal acceleration.
Of the nine known planets in our solar system, the innermost is Mercury. When
compared to the other planets in the system, Mercury has the:
a.nothing
According to Kepler's second law, Halley's Comet circles the Sun in an elliptical path
with the Sun at one focus of the ellipse. What is at the other focus of the ellipse?
a.1.8 years
For any object orbiting the Sun, Kepler's Law may be written T2 = kr3. If T is measured
in years and r in units of the Earth's distance from the Sun, then k = 1. What, therefore,
is the time (in years) for Mars to orbit the Sun if its mean radius from the Sun is 1.5
times the Earth's distance from the Sun?
b.be over the equator.
In order for a satellite to be geosynchronous, its orbit must:
c.8 years
An asteroid is in orbit at 4 times the earth's distance from the Sun. What is its period of
revolution?