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Friction and gravity:

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Friction and gravity: Friction and gravity: How do gravity and friction affect space travel? It will be important today to write notes in your own words (DO NOT COPY ... – PowerPoint PPT presentation

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Title: Friction and gravity:


1
Friction and gravity
2
Friction and gravity
  • How do gravity and friction affect space travel?

3
  • It will be important today to write notes in your
    own words (DO NOT COPY WHAT YOU ARE ABOUT TO SEE
    WORD FOR WORD!!!!!!!)

4
  • It will be important today to write notes in your
    own words (DO NOT COPY WHAT YOU ARE ABOUT TO SEE
    WORD FOR WORD!!!!!!!)
  • Copying word for word may make your head hurt!!!!!

5
  • It will be important today to write notes in your
    own words (DO NOT COPY WHAT YOU ARE ABOUT TO SEE
    WORD FOR WORD!!!!!!!)
  • Copying word for word may make your head
    hurt!!!!!
  • Pictures will help!!!!!!!!!!

6
Friction
  • Friction

7
Friction
  • Friction The force that resists relative motion
    between two objects whose surfaces are in
    contact.

8
Types of Friction
  • Static friction

9
Types of Friction
  • Static friction The force that resist motion as
    outside forces try to force two objects to slide
    across one another.

10
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11
Types of Friction
  • Static friction The force that resist motion as
    outside forces try to force two objects to slide
    across one another.
  • Sliding friction

12
Types of Friction
  • Static friction The force that resist motion as
    outside forces try to force two objects to slide
    across one another.
  • Sliding friction The force that works to stop
    two objects from moving across one another once
    they are moving.

13
Types of Friction
  • Traction

14
Types of Friction
  • Traction The largest amount of frictional force
    that an object can get from another object.

15
Gravity
  • Gravity

16
Gravity
  • Gravity The attractive forces between every pair
    of objects in the universe.

17
Gravity
  • Gravity The attractive forces between every pair
    of objects in the universe.
  • An objects gravitational force is trying to pull
    every other object to its center.

18
Gravity
  • Mass

19
Gravity
  • Mass A measure of the amount of material (stuff)
    an object contains.

20
Gravity
  • Mass A measure of the amount of material (stuff)
    an object contains.
  • Mass is what causes an object to have weight in
    the presence of a gravitational field.

21
Gravity
  • Weight

22
Gravity
  • Weight The downward force on an object due to a
    gravitational force.

23
Friction and Gravity
  • Less gravity means less weight.

24
Friction and Gravity
  • Less gravity means less weight.
  • Less weight means friction is affected.

25
  • Earth 100 lbs.

26
  • Earth 100 lbs.
  • Moon 16.6 lbs.
  • Mercury 37.8 lbs.
  • Venus 90.7 lbs.
  • Mars 37.7 lbs.
  • Jupiter 236.4 lbs.
  • Saturn 106.4 lbs.
  • Uranus 88.9 lbs.
  • Neptune 112.5 lbs.
  • Pluto 6.7 lbs.
  • SUN 2,750 lbs.
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