Physics Gravitation Level: Misc Level
M 1 is a spherical mass ( 27.0 kg ) at the origin. M2 is also a spherical mass ( 10.3 kg) and is located on the x- axis at x= 92.0 m.At what value of x would a third mass with a 12.0 kg mass experience no net gravitational force due to M 1 and M 2?
Physics Gravitation Level: Misc Level
Gravity in Space
You are explaining to friends why astronauts feel weightless orbiting in the space shuttle, and they respond that they thought gravity was just a lot weaker up there. Convince them and yourself that it isn't so by calculating how much weak gravity is 275 km above the Earth s surface in terms of g.Do not enter units.
Physics Gravitation Level: Misc Level
Acceleration Due to Gravity
Calculate the acceleration due to gravity on Uranus. The radius of Uranus is about 2.56 E+7 m and its mass is 8.68 E+25 kg.
Physics Gravitation Level: Misc Level
(a) Calculate, using Newton s law of gravity, the size of the force of attraction between the Earth and a mass of 5.0 kg on the Earth. Data: Distance to the center of Earth from the surface =6370 km.Mass of Earth = 5.98 10 24 kg. Gravitational constant (G =6.67 times 10-11 Nm^2 /kg^2).
(b) Calculate, using Newton s law of gravity, size of the force of attraction between the moon and a mass of 5.0 kg on the earth surface nearest the moon. Data: Distance to the moon from surface of the earth =376,000 km. Mass of moon =7.36 times 10 22 kg.
Physics Gravitation Level: Misc Level
A star rotates about its axis through a diameter once in 50 days. At the end of its life, the star collapses to one - hundredth of its original diameter.The rate of rotation of the collapsed star will be:
Physics Gravitation Level: Misc Level
Calculate the effective value of g, the acceleration of gravity, at 3380 m above the Earth s surface.
Physics Gravitation Level: Misc Level
A typical GPS (Global Positioning System ) satellite orbits at an altitude of 3.4 x 10 7 m.( Astronomical data needed for this problem can be found on the inside back cover of the text.)
(a) Find the orbital period of such a satellite.22 hours
(b) Find the orbital speed of such a satellite.----- km/s
Physics Gravitation Level: Misc Level
The acceleration of gravity on the surface mars is know to be about 1/3 the acceleration of gravity on the Earth.Given that the radius of mars is roughly 1/2 that of the Earth, find the mass of mars in terms of the mass of the Earth. X M Earth
Physics Gravitation Level: Misc Level
a) Find the acceleration of gravity on the surface of Neptune.
m/s2
(b) Find the acceleration of gravity on the surface of Jupiter.
m /s 2
Physics Gravitation Level: Misc Level
Stars originate as large bodies of slowly rotating gas. Because of gravity, these clumps of gas slowly decrease in size. What happens to the angular velocity of a star as it shrinks?Explain.
Physics Gravitation Level: Misc Level
Each of a pair of binary stars with individual mass (M) is in circular orbit of radius (R) The systems center of mass is at rest. what is the speed of each star in terms of G, M and R?
Physics Gravitation Level: Misc Level
The diameter of the Sun is 13.9x10 to the 8th m, and the distance from the Earth to the Sun is 1.5 x 10 to the 11 th m. How long it take for the Sun to disappear after it touches the horizon during sunset? (lgnoring effects due to refraction with in Earths atmosphere.)
Physics Gravitation Level: Misc Level
A man weinghts 600 Nwhile on the surface of Earth.If he is transported to the planet mythos, which has the same mass as Earth but a radius that is twice as large as Earths his weight would be?
Physics Gravitation Level: Misc Level
Six identical physics books, each with a mass of 2.0 kg are taken to the moon. On the moon, their combined mass is?
Physics Gravitation Level: Misc Level
The sun and moon both have an effect on the tides. Which one has the larger effect, and why?
