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Motion and Force

Studying for Position and Motion quiz

TermDefinition
Reference point The starting point you choose to describe the location or position of an object.
Position An object's distance and direction from a reference point.
Motion The process of changing position.
Displacement The difference between the initial, or starting, position and the final position.
Speed A measure of the distance an object travels in a given amount of time.
Velocity The speed and direction of a moving object.
Vector A quantity that has both magnitude and direction.
Acceleration A measure of the change in velocity during a period of time.
Force A push or pull of an object.
Contact force A push or pull on one object by another object that is touching it.
Newton's 2nd law of motion The acceleration of an object equals the net force on the object divided by the object's mass.
Friction A force that resists the sliding motion of two surfaces that are touching.
Free-body diagram A simple model to understand systems of objects with any amount of applied forces.
Net force The sum of all the forces acting on an object.
Newton's 1st law of motion An object in motion will stay in motion, and an object at rest will stay at rest unless acted on by a force.
Inertia An object's ability to resist any change in motion.
Newton's 3rd Law of motion When an object applies a force on another object, the second object applies a force of the same strength on the first object, but the force is in the opposite direction.
Force Pair The forces two objects apply to each other.
Normal force The force that pushes perpendicular to the object's surface.
Elastic Collision When colliding objects bounce off each other.
Inelastic Collision A collision in which there is a loss of kinetic energy but total momentum is conserved. Typically transforming into heat, sound, or material deformation.
Non-contact force A force that one object can apply to another object without touching it.
Gravity An attractive force that exists between all objects that have mass.
Field A region of space that has a physical quantity (such as a force) at every point.
Weight The gravitational force exerted on an object.
Created by: Hiu Ly Yun
 

 



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