9.2 Universal Gravitational Constant, G

What is the magnitude of the gravitational force between two 1 kg bodies that are 1 m apart?

6 x 10-11 N

What is the magnitude of G

6.67 x 10-11

What are the units of G?

Newtons

When G was first measured by Henry Cavendish, newspapers of the time hailed his experiment as the "weighing Earth experiment" Why?

The mass of Earth could then be calculated, but weighing of Earth hit a more popular tone

What kind of force is G?

is a very weak force with electrical forces

Weight depends on

mass and distance from the center of the Earth

G

universal gravitational constant

The force of attraction between you and Earth can be measured by?

weight