Curiosity Corner
A push or a pull that can change an object’s motion or shape.
Force
A force that acts without touching, like gravity or magnetism.
Non-contact force
A force that happens when objects touch each other.
Contact force
A force that acts inside an object or system.
Internal force
A force that comes from outside an object or system.
External force
A force that slows motion when two surfaces rub together.
Friction force
A force that a person or object uses to push or pull something.
Applied force
A force from a stretched or squeezed spring that tries to return to its shape.
Spring force
A pulling force through a rope, string, or cable.
Tension force
A force that squeezes or pushes objects together.
Compression force
A force that causes an object to bend.
Bending force
When an object changes shape and does not return to its original shape.
Plasticity
When an object can return to its original shape after being stretched or squeezed.
Elasticity
For every action force, there is an equal and opposite reaction force.
Newton’s Third Law
The force that starts an interaction.
Action force
The equal and opposite force that happens because of the action force.
Reaction force.
A change that can be reversed.
Temporary change
A change that cannot be reversed.
Permanent change
A force that makes parts of an object slide past each other in opposite directions.
Shear force
A force that twists an object.
Torsion force
When you pull both ends of a jump rope and it becomes tight, what force is acting on the rope?
Tension force
A book slides to a stop after being pushed across a table. What force caused it to slow down?
Friction force
When you twist the lid off a jar, what type of force are you using?
Torsion force
A ruler bends when you press down on the middle but does not break. What force is causing the ruler to bend?
Bending force
When you jump off a skateboard, the board rolls backward as you move forward. Which law explains this?
Newton’s Third Law