__NEWTONS LAW OF GRAVITY__

INFORMATION* any two bodies in the universe attract each other with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. * Where: *F*is the force between the masses,*G*is the gravitational constant,*m*1 is the first mass,*m*2 is the second mass, and*r*is the distance between the centers of the masses.
* G is a constant. |
PRACTICE PROBLEMS |

__INVERSE-SQUARE LAW__

INFORMATION* any physical law stating that a specified physical quantity or intensity is inversely proportional to the square of the distance from the source of that physical quantity. * If you double the distance between the light and the subject, you need four times as much light to get the same exposure. *If you reduce the distance between the light and the subject by half, you only need one quarter as much light to have the same exposure. Here’s another example: |
Experiment Ideas |

__Coulomb's Law__