Science Unit 2 Vocabulary Flashcards
Change in velocity
acceleration
Part of a force pair. Causes a reaction. Opposite direction of reaction.
Action force
Force of air pushing against a moving object
(Contact Force)
Air resistance
A force that is acted onto an object. It is applied to an object by another object. (Contact Force)
Applied Force
Forces with a net force of zero. Equal and opposite. No acceleration.
Balanced force
When an object’s direction is changing, but the speed remains the same.
Centripetal acceleration
A force that acts on a body moving in a circular path and is directed toward the center around which the body is moving.
Centripetal Force
acting perpendicular to the direction of motion. Moving around in a circle.
Circular motion
A force that occurs as a result of two or more objects that touch each other. Six types.
Contact Force
A collision where no kinetic energy is lost. Two objects have no shape distortion. The same before and after. Objects energy is transferred to the other. The momentum is the same both before and after.
Elastic collisions
A non-contact force that involves charged particles and their association with each other.
Negative charged particles and positive charged particles attract. other combinations repel .
Positive is attracted to the negative.
Electromagnetic Force
Friction of the surface that interacts with a fluid. Liquid or a gas.
Fluid friction
A push or a pull on an object. Has strength and direction. Vector measure.
Force
Action and Reaction force.
One causes the other.
Also called opposite forces.
Ex: Gravity & Normal Force
Going in opposite directions. Both occur at the same time. Equal in magnitude and opposite direction.
Force pairs
Generated by two objects moving against each other. the resistance that one surface or object encounters when moving over another.
Friction
The acceleration of this force is 9.8 m/s^2. Opposite of normal force. An invisible force that attracts or pulls objects to each other. Objects with more mass have more of this.
Gravity
mass and gravity
positive direct and linear
gravity and direction
negative inverse and non linear or exponential
A collision which results in kinetic energy to be lost(transferred another way). Shape distortion might be present. Converted into another type of energy. The momentum of the beginning and end is not the same.
inelastic collisions
Based solely on mass. The objects tendency to resist acceleration.
Inertia
Something affected by position or location. ex: weight
Location dependent
Something not affected by position or location. Always stays the same.
Ex: Mass
Location independent
Combination of forces acting on an object.
If the forces are acting in the same direction then add.
If they are acting in opposite directions that subtract.
Net force
SI unit for weight.
kg*m/s^2
Newton
