Do NowIn your notebook, answer the following

question in complete sentences:

What is the difference between mass and weight?

Mass vs. WeightMass

The amount of matter in an objectWeight

The force of gravity acting on an object

The difference??

GRAVITY

What forces act upon celestial bodies?

Gravity

ObjectivesDefine the term gravity.Compare and contrast mass and weightDescribe the factors that affect gravity

What is Gravity?Gravity is the attractive force between

two objectsGravity’s magnitude depends on:

Mass of objects involvedDistance between objects

Newton’s Law of Gravitation

F = Gravitational ForceG = Universal Gravitation Constant =

6.6726x10-11m3/(kg•s2)m1 = mass of first object

m2 = mass of second objectr = distance between centers of objects

Gravity in SpaceBody

Multiple ofEarth gravity

m/s2

Sun 27.90 274.1

Mercury 0.3770 3.703

Venus 0.9032 8.872

Earth 1 9.8226

Moon 0.1655 1.625

Mars 0.3895 3.728

Jupiter 2.640 25.93

Saturn 1.139 11.19

Uranus 0.917 9.01

Neptune 1.148 11.28

Pluto 0.0621 0.610