Danger Zone

1
Danger Zone
2
Landing Safely

• You are the lead engineers and you must drop
  Captain Krueger as slowly and safely as possible
  onto the surface of your planet.

3
Test Design

• Your test object Wood Wheel
• Your model supplies
• - Tissue Paper, Construction paper, or Plastic
  bags (no more than 3 of any)
• - More is not always better!
• - Tape, String
• - The test drop height 5 meters

4
Design Time!
5
Fun Facts

• Highest skydive on record is 102,800 feet,
  achieved by an Air Force test pilot who leapt
  from a balloon in 1960.
• Future space divers will attempt jumps from
  about 60 miles from an open-cockpit rocket

6
Fun Facts

• Without adequate pressure suits, a divers blood
  will boil, causing quick death.
• Thermal protection must insulate diver from 232C
  (or 450F) temperatures on the descent

7
Future Space Divers

• 328,083 FT
• -It would take a diver 10 minutes to fall from
  this feet.
• 108,267 FT
• -The diver would reach a maximum speed of 2,500
  miles per hour.

8
Future Space Divers

• 104,000 FT
• -The divers suit will heat up from -40F to
  464F.
• 32, 808 FT
• -The diver reaches terminal velocity of 120
  miles per hour.
• 3,000 FT
• -The diver pulls parachute, and glides to Earth.

9
Current Parachutes

• Round
• Ram-Air

10
Make Changes, Retest
11

• Why do objects fall to the ground?
• Gravity!
• What is Gravity?
• A force based on mass and distance.
• What is a Force?
• Push or a pull

12
Motion

• What is a balanced force?
• Equal forces that act in opposite directions
• Does not change an objects motion
• What is an unbalanced force?
• Forces that do not cancel each other out
• Always change the motion of an object

13
Motion

• Newtons Laws?

14
Why?

• Is gravity still acting on the object with the
  parachute?
• So.What makes the object with the parachute drop
  slower?

15
Gravity
Gravity
Air resistance
16
Mars Rover

• Launch to Landing (click, if internet available)
• Or open QuickTime video in Parachute - Media File

17
Welcome to Mars
Real photograph taken by a Mars Rover
18
Discussion Questions

• What improvements did you make to your design?
  And Why?
• To safely drop a spaceship carrying Capt. Krueger
  on your planet, what would need to be different
  from your model?

19
Wrap Up time

• What force causes a change in motion?
• Unbalanced force
• Balanced force
• Both A and B
• None of the above

20
Wrap Up

• If an object is traveling at a constant velocity
  or if an object is at rest, then the forces
  acting on that object are ______.
• A. Equal
• B. Opposite
• C. Balanced
• D. All of the above

21
Wrap Up time

• What causes an object with a parachute to slow
  down?
• Gravity
• Air Resistance
• Friction
• Both B and C