Question

An Earth satellite is in a circular orbit at an altitude of 500 km. Explain why the work done by the gravitational force acting on the satellite is zero. Using the work-energy theorem, what can you say about the speed of the satellite?

Answer #1

A satellite in Earth orbit has a mass of 98 kg and is at an
altitude of 293 ? 103 km.
(a) What is the potential energy of the Earth-Satellite
system?
(b) What is the magnitude of the gravitational force exerted by
the Earth on the satellite?
(c) What is the magnitude of the gravitational force exerted by
the satellite on the Earth?

A satellite of mass 350 kg is in a circular orbit around the
Earth at an altitude equal to the Earth's mean radius.
(a) Find the satellite's orbital speed.
m/s
(b) What is the period of its revolution?
min
(c) Calculate the gravitational force acting on it.
N

A satellite is in a circular orbit around the Earth at an
altitude of 3.32 106 m. (a) Find the period of the orbit. (Hint:
Modify Kepler's third law so it is suitable for objects orbiting
the Earth rather than the Sun. The radius of the Earth is 6.38 106
m, and the mass of the Earth is 5.98 1024 kg.) h (b) Find the speed
of the satellite. km/s (c) Find the acceleration of the satellite.
m/s2 toward the...

A satellite is in a circular orbit around the Earth at an
altitude of 1.66 106 m. (a) Find the period of the orbit (in hrs).
(Hint: Modify Kepler's third law: T2 = (4π2/GMS)r3 so it is
suitable for objects orbiting the Earth rather than the Sun. The
radius of the Earth is 6.38 106 m, and the mass of the Earth is
5.98 1024 kg.) (b) Find the speed of the satellite (in km/s). (c)
Find the acceleration of...

A satellite is in circular orbit about Earth at an altitude of
300km. What are its: a) orbital period. b) orbital frequency and c)
linear speed?

A satellite is in a circular orbit around the Earth at an
altitude of 3.84 106 m.
(a) Find the period of the orbit. (Hint: Modify
Kepler's third law so it is suitable for objects orbiting the Earth
rather than the Sun. The radius of the Earth is
6.38 106 m, and the mass of the Earth is
5.98 1024 kg.)
h
(b) Find the speed of the satellite.
km/s
(c) Find the acceleration of the satellite.
m/s2 toward the center of the...

A 400 kg satellite is in a circular orbit at an altitude of 525 km
above the Earth's surface. Because of air friction, the satellite
eventually falls to the Earth's surface, where it hits the ground
with a speed of 2.30 km/s. How much energy was transformed into
internal energy by means of air friction?

A satellite is in a circular orbit around the Earth at an
altitude of 3.78 106 m.(Hint: Solve the parts in reverse order.)
(a) Find the period of the orbit. h (b) Find the speed of the
satellite. (c) Find the acceleration of the satellite. m/s2 toward
the center of the earth

A 400 kg satellite is in a circular orbit at an altitude of 550
km above the Earth's surface. Because of air friction, the
satellite eventually falls to the Earth's surface, where it hits
the ground with a speed of 1.90 km/s. How much energy was
transformed into internal energy by means of air friction?
J

A 565-kg satellite is in a circular orbit about Earth at a
height above Earth equal to Earth's mean radius.
(a)
Find the satellite's orbital speed.
_____ m/s
(b)
Find the period of its revolution.
_____h
(c)
Find the gravitational force acting on it.
_____N

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