8029

Physics Gravitation Level: Misc Level

At some point in the future, after the Earth olympics, the milky way olympics are held on the planet zarkon.(zarkon is inhabited by folks who like to think up physics questions.) This planet has a mass that is 0.100 that of the Earth, and a radius that is 0.500 that of the Earth.zarkon also has a little moon Abba (that is rumored to be populated by retired swedish rock stars).Abba hasa mass which is 0.010 that of zarkon,and a radius which is 0.20 that of zarkon.what is the acceleration of gravity (9 abba ) at the surface of Abba?


7630

Physics Gravitation Level: Misc Level

At some point in the future, after the Earth Olympics, the Milky Way Olympics are held on the planet Zarkon. (Zarkon is inhabited by folks who like to think up physics questions.) This planet has a mass that is 0.100 that of the Earth,and a radius that is 0.500 that of the Earth.Zarkon also has a little moon Abba (that is rumored to be populated by retired Swedish rock stars).Abba has a mass which is 0.010 that of Zarkon, and a radius which is 0.20 that of Zarakon. What is the acceleration of gravity(gabba ) at the surface of Abba? Use gse zarkon =3.92 m/s2 to answer the next two question (if necessaryi).


7614

Physics Gravitation Level: Misc Level

The weight of an object is the same on two different planets. The mass of plane A is only twenty-five percent that of planet B. Find rA/rB, which is the ratio of the radii of the planets.


7612

Physics Gravitation Level: Misc Level

A bowling ball(mass=7.2 kg, radius=0.11 m) and a billiard ball (mass=0.32 kg, radius=0.028 m) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational force that each can exert on the other?


7548

Physics Gravitation Level: Misc Level

What are the restrictions on the orbit of a communications satellite it is to appear motinless in the sky as viewed from any location on earth?


7547

Physics Gravitation Level: Misc Level

Why does the force of gravity change the speed of a satellite in an ellipticall orbit?


7545

Physics Gravitation Level: Misc Level

Many people mistakenly believe that astronauts that orbit the Earth are ''above gravity''Calculate the accelration due to gravity (g)for space shuttle territory, 200 kilometers above Earth,s surface. Earth,s mass is 6x 10 kilograms and its radius is 6.38 x 10 meters (6380 kilometers).Your answer is what percentage of 9.8 m/s2?


7408

Physics Gravitation Level: Misc Level

Four identical point particles(each having massm+5000 kg) are located at the points (-2,0), (0,8), (6,0) and (0,3) in the xy plane. All positions are measured in meters. Determine the magnitude of the total gravitational force on the particle located at(6,0)due to the other three particles.**Need work and solution*


7407

Physics Gravitation Level: Misc Level

A distan star has two planets following circular orbits about the star with one planet four times the distance from the star as the other planet. If the planet closer to the star has a period of 2 years, determine the period of the planet farther from the star *Need just solution*


7344

Physics Gravitation Level: Misc Level

Callisto and Io are two Jupiter moons. The distance from Callisto to the center of Jupiter is approximately 4.5 times as far as Io. How does Callisto,s orbital period, Tc, compare to that of Io, Ti?

Tc=4.5 Ti

Tc=21 Ti

Tc=9.5 Ti

Tc=0.2 Ti

Tc=2.7 Ti


7250

Physics Gravitation Level: Misc Level

Many people mistakenly believe that the astronauts orbiting the earth are above gravity, Calculate the acceleration due to gravity, g, for space shuttle territory, 200 kilometers above the earth,s surface. Earth,s mass is 6x1024 kg, and its radius is 6.38x106 m (6380 km). Your answer is what percentage of 9.8 m/s2?


7069

Physics Gravitation Level: Misc Level

The highest tides occur when;

a.The Sun and the Moon are on the same side of Earth.

b. The Sun and the Moon are on opposite side of Earth.

c. The Sun , Moon, and Earth form a right-angled triangle with Earth at the 90 degree vertex.

d,The Sun, Moon, and Earth form a right -angled triangle with the Moon at the 90 degree vertex.


7068

Physics Gravitation Level: Misc Level

What is the ratio of potential energy to kinetic energy for a comet that has just enough energy to escape from the Sun,s gravitational field?

a.1/2

b.1

c.2

d.-1


7067

Physics Gravitation Level: Misc Level

Three masses are located are follows; a 3.0-kg mass is at the origin, a 4.5-kg mass at (0.0 m, 4.0 m), and a 2.5-kg mass at (3.0 m,0.0 m). What is the gravitational energy of the system of masses? G=6.67X10 to power (-11) N x m squared.

a. -3.8x10 to power of (-10) J

b.-3.9x10 to powerof (-10)J

c.-54x10 to power of (-10)J

d.-3.2x10 to power of (-10)J


7066

Physics Gravitation Level: Misc Level

Because Earth,s orbit is slightly elliptical, Earth actually gets closer to the Sun during part of the year. When Earth is closer to the Sun its orbital speed is;

a.Less than when Earth is farthest away from the Sun

b.The same as when Earth is farthest away from the Sun.

c.Greater than when Earth is farthest away from the Sun.

d. Sometimes greater sometimes smaller than when Earth is farthest away from the Sun.


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