Gravitation

Question 1

Field

Answer 1

A region of space where a force is active. It describes all cases where two (or more) objects separated in space exert forces on each other

Question 2

Newton’s Law of Universal Gravitation

Answer 2

Each point mass in the universe attracts every other point mass with a force that is directly proportional to the product of their masses and indirectly proportional to the square of the distances between them

Question 3

Gravitational Potential Energy

Answer 3

The work done in bringing an object of mass m from infinity to a point P

Question 4

Gravitational Potential

Answer 4

The gravitational potential energy of a unit mass

Question 5

Equipotential Lines

Answer 5

Lines that signify where the potential has the same value

Question 6

Kepler’s First Law

Answer 6

The Law of Orbits: All planets move in elliptical orbits, with the sun at one focus

Question 7

Kepler’s Second Law

Answer 7

The Law of Areas: A line that connects a planet to the sun sweeps out equal areas in equal times

Question 8

Kepler’s Third Law

Answer 8

The Law of Periods: The square of the period of any planet is proportional to the cube of the semi-major axis of its orbit