Some of Those Who Run Forces...
A push or pull on an object
Force
Force the opposes motion of objects that come in contact with each other
Friction
This force keeps an object in a curved path or orbit. Example: a ball swinging around on a rope
Centripetal
What is the momentum of a 2kg dog running at 5m/s ?
10 kg*m/s
Measurement with direction and magnitude...Oh Yeah!
Vector
The total of all forces acting on an object
Net Force
The friction involved in someone ice skating
Sliding
This is the weakest universal force, but it can act over long distances.
Gravitational
What is the force of a 200kg man sliding downhill at 4m/s2 ?
800 N
This is needed to judge motion accurately.
Frame of Reference
The friction involved in ball bearings
Rolling
This force is important for atoms and radioactive decay.
What is the weight of a 12kg bowling ball on Earth ?
117.6 N or 117.6 kg*m/s2
9.8 m/s2
Mass is not changed due to gravitational pull. What is affected by gravity? (Mass X 9.8m/s2)
Weight
The friction of objects that move through a liquid or gas
Fluid
This force is the strongest and matters because it keeps atoms together.
Strong Nuclear
What is the mass of a baby carriage exerting 10N of force as it is pushed 1m/s2 down the sidewalk?
10 kg
The system of measurement used in Science
SI or Metric
List Newton's 3 Laws of Motion
1st- Inertia
2nd- Force = Mass X Acceleration
3rd- Every Action has an equal and opposite reaction force
The friction of objects that are not moving
Static
This force is involved in charged particles and fields.
Electromagnetic
After Bert stole $30 from Ernie, he pushed him out of an airplane. Ernie has been on a strict diet and only has a mass of 50kg. That's still pretty large for a puppet, but he is proud of how much mass he has lost. What is Ernie's acceleration as he free falls to Earth?
9.8m/s2
Don't get caught up in the drama of the story problem. An object in free fall is only acted upon by gravitational acceleration.
The average speed of a turtle traveling 10 meters in 10 seconds
1 m/s