Newton's law of gravitation
State Newton's Law of Gravitation
The gravitational force F between two point masses M and m separated by a distance r acts along the line joining their centres and is proportional to the masses and inversely proportional to the square of their separations.
F proportional Mm/r2
Newton's law of gravitation assumes that the gravitational force between any two objects is
(state just one)
1 out of 3
State Newton's law with the gravitational constant.
F = GMm/r2
Newton's law of gravitation assumes that the gravitational force between any two objects is
(state two)
2 out of 3
40 years before Newton, who showed that each planet orbits the Sun and is governed by law.
Johannes Kepler
Newton's law of gravitation assumes that the gravitational force between any two objects is
(state all three)
always attractive
proportional to the mass of each object
proportional to 1/r2 where r is their distance apart.
State Kepler's 3rd Law
r3 / T2 Same for all planets
Who measured G (not Newton)?
Full name
Henry Cavendish
State inverse square Law (Newton's)
The force of attraction between any planet and the Sun varies inversely with the square of their distances apart.
How far from the centre of the Moon is the Earth-Moon neutral point, where the Earth and the Moon's gravitational field strengths are equal in magnitude but opposite in direction? Show your work.
Me = 6.0 x 1024
Mm = 7.4 x 1022
rm = 3.8 x 108
38 x 106 m