Transcript Gravity Powerpoint

 In
your notebook, answer the following
question in complete sentences:
What is the difference between mass and
weight?
 Mass
• The amount of matter in an object
 Weight
• The force of gravity acting on an object
 The
difference??
GRAVITY
What forces
act upon
celestial
bodies?
 Define
the term gravity.
 Compare and contrast mass and weight
 Describe the factors that affect gravity
 Gravity
is the attractive force between two
objects
• Gravity’s magnitude depends on:
 Mass of objects involved
 Distance between objects
 Any
two objects in the universe have
some gravity between them
• Q:
• A:
Do two people have gravity each other?
Yes, but it is not noticeable because
they are so small
 Gravity
keeps us on earth’s surface, but
 Lack of gravity in space allows astronauts
to float
 All objects fall at the same rate due to
gravity
 Keeps planets orbiting around sun, and
moons around planets
F
= Gravitational Force
 G = Universal Gravitation Constant =
6.6726x10-11m3/(kg•s2)
 m1 = mass of first object
 m2 = mass of second object
 r = distance between centers of objects
Body
Multiple of
Earth gravity
m/s2
Sun
27.90
274.1
Mercury
0.3770
3.703
Venus
0.9032
8.872
Earth
1
9.81
Earth’s 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