FORCES

1
FORCES
2
FORCES

• Net Force is what is left over from opposing
  forces
• - Example Tug of War Net force is 200 N

11,200 N
11,000 N
3
FORCES

• Net Force is also called unbalanced force or
  resultant force.
• Any unbalanced force results in Acceleration
  (speed up, slow down, turn)

4
FORCES
What would happen if he only pedaled with a force
of 80 N, or if he pedaled with a force of 150 N?
Gravity (weight) 675 N (150 lbs.)
Air Friction 20 N Ground Friction 80 N
Pedaling 100 N
Ground Resistance 675 N
Therefore, for a steady velocity (equilibrium),
the pedaling force must be 100N
5
MOON FACTS
6
MOON FACTS

• The moon has less gravity than Earth.
• a. If you are standing on the moon and you drop
  something, it will fall!
• b. Falling things accelerate at a lower rate
  than Earth. Earths acceleration due to gravity
  is 9.8 m/s/s, while the moons acceleration due
  to gravity is 1.6 m/s/s.

7
MOON FACTS

• 2. The moon has NO atmosphere.
• a. There is no air friction
• b. Falling objects never reach a terminal
  velocity.
• c. Falling objects get to very fast speeds if
  they start from high up on the moon.

8
MOON FACTS

• 2. The moon has NO atmosphere.
• d. There are no shooting stars on the moon
  because there is no air friction to burn them up.
• e. Most of the surface of the moon has been
  pulverized into powdered rock because anything
  that falls to the surface from space hits very
  hard.