gravitational field

Question 1

newton’s law of gravitation

Answer 1

force of attraction between any two point masses is directly proportional to the product of their masses and inversely proportional to the square of their separation

Question 2

a field of force

Answer 2

region of space that can be mapped with lines of force or potential. within the field, forces act at a distance

Question 3

gravitational field strength

Answer 3

gravitational force per unit mass acting on a small mass placed at that point

Question 4

gravitational potential energy

Answer 4

work done by an external agent in bringing the mass from infinity to that point

Question 5

gravitational potential

Answer 5

work done per unit mass by an external agent in bringing a mass from infinity to that point

Question 6

escape velocity

Answer 6

minimum velocity that the body must have at the Earth’s surface in order to escape from the influence of the Earth’s gravitational field