History
Isaac Newton's discovery of gravity was inspired by an apple falling from a tree. True or False?
True!
M1 = 200 Kg M2 = 500Kg r = 25m Fg = ?
Fg = 1.067 x 10-8 N
Planet X and Planet Y have a mass of 3 x 1024kg and 4.5 x 1025kg. Their gravitational force is 3.6 x 1020N. How far apart is planet x from planet y?
r= 5.0 x 109 m
What are the two main theories that serve as the foundation for studying gravity?
1. The Big Bang Theory
2. Einstein’s Theory of Relativity
3. Newton’s Law of Universal Gravitation
4. Friedrich Engels’ Theory
5. Charles Darwin’s Theory
Einstein’s Theory of Relativity
Newton’s Law of Universal Gravitation
What's the Fg (in Newtons) between Earth (M1 = 5.972 x 1024 Kg) and its moon (7.348 x 1022 Kg)? The average distance between Earth and its moon is 3.844 x 108 meters.
Fg = 1.98 x 1020 Newtons
calculate the acceleration due to gravity (a) on the surface of the earth and (b) 3500 km above the surface of the earth. The mass of the earth is 5.98 x 1024 kg. The radius of the earth is 6.37 x 106 m.
a) g on earth = 9.83 m/s2
b) g from point B = 4.08 m/s2
What did Einstein's General Theory of Relativity propose about gravity?
a) It's force between objects
b) It is the warping of spacetime by massive objects
c) It is only relevant in space
d) It does not affect time
b) It is the warping of spacetime by massive objects
Planet X has a gravitational acceleration of 7.5 m/s2 and a radius of 4.5 x 106 m. What's the mass of planet X?
M = 2.28 x 1024 Kg
An asteroid has a mass of 4.7 x 1013 Kg. The asteroid passes near Earth, and at its closet approach, the separation of the centers of mass of the asteroid and Earth is four times the average orbital radius of the Moon. What force does the asteroid exert on Earth when at its minimum distance from Earth? Use a Value of 384400 Km for the average orbital radius of the Moon.
F = 7.9 x 109 Newtons
This is the gravitational force of attraction between the asteroid and the Earth. ^.^
5. When were gravitational waves first detected?
a) 1915
b) 2015
c) 1687
d) 1905
b) 2015
What is the acceleration due to gravity on Neptune if the radius is 2.48 x 107 m and the mass is 1.02 x 1026 kg?
g = 11.1 m/s2
Planet Nede has a mass of 6.50 x 1023 kilograms and a radius of 2.96 x 106 meters. The magnitude of the gravitational force of attraction exerted on a 5.00-kilogram object by planet Nede is 7.15 newtons when the object is located at a position 5.50 x 106 meters from the center of Nede. Calculate the gravitational field.
g= 1.43 N/Kg or g= 1.43 m/s2