Newton's Laws

Question 1

Newton’s First Law of Motion

Answer 1

A body at rest, remains at rest. A body in motion remains in uniform motion; unless acted upon by a force.

Question 2

Newton’s Second Law of Motion

Answer 2

• States the acceleration of an object is dependent on the mass on an object and the force being acted upon the object.
• F = ma

Question 3

Newton’s Third Law of Motion

Answer 3

For every force, there is an equal, but opposite force

Question 4

The Universal Law of Gravitation (and its results)

Answer 4

• Describes an attractive force between any two bodies
• Fg = GMm / r^2
  g = GM / r^2
• Showing that more mass = more gravitational force

Question 5

Newton’s Corollary to Kepler’s Third Law

Answer 5

• Provides astronomers with the only way to measure the masses of astronomical objects
• (M + m) = ( 4pie^2 / G ) x (a^3 / p^2)