Newton
Newton's third law states...
For every action force, there is an equal and opposite reaction force
Elasticity is a property that enables ___________ changes.
Temporary
Define a force (think: door)
Push or Pull
A force crushing a material or object by squeezing it
compression
A natural force of attraction that pulls objects towards each other.
Gravity
What are the action and reaction forces when a balloon on the string moves when the air rushes out.
Action - Balloon releasing air
Reaction - balloon moving across the string
Give an example of a material that shows plasticity.
Playdoh, cookie dough, etc.
Name a non-contact force
Gravity, magnetism, etc
A force that stretches something You might say it makes you feel tense.
Tension
Define external force
A force applied from the outside
In a rocket launch, which force propels the rocket upward?
The reaction force. (The gas pushing downward is the action force)
The ability of an object to return to its original shape after being stretched.
Elasticity
Which of the following is a contact force?
- Gravity
- Friction
- Magnetic force
Friction
What type of internal force happens when an object is twisted?
Torsion
When a rubber band is stretched and let go, this force helps it return to its original shape.
Spring/Elastic Force
Push against the wall. Does the wall move? Explain using Newtons 3rd Law of Motion
Equal and opposite forces.
What does "plasticity" mean?
The ability of a material to be deformed and retain its new shape
There are 2 main forces that act on a structure, name these.`
Internal and External
What internal force occurs when parts of an object slide past each other within the material?
Shear
Which external force causes an object to slow down?
Friction
When you step on a bug, the bug applies an equal and opposite force on your foot as your foot applies to the roach.
True
What natural force may cause compression on a building?
Earthquake
There are 4 main internal forces, name those
Compression, tension, torsion, shear.
When this happens, there is a greater tension on one side and a greater compression on the opposite side, like what happens to your spoon when you try to scoop hard ice cream?
Bending
External forces are forces that...
Affect an object from the outside