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Science Vocab

science vocab words and definitions

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 the 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 on an object.
Contact Force A push or pull on one object by another that is touching it.
Newton’s 2nd Law The acceleration of an object is equal to the net force acting 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 that can help you understand the forces acting on an object.
Net Force The sum of all the forces acting on an object.
Newton’s First Law If the net force on an object is zero, the motion of the object does not change.
Inertia The natural tendency of an object to resist changes in its state of motion.
Newton's 3rd Law When an object applies a force on another object, the second object applies a force of the same strength on the first object but in the opposite direction.
Force pairs 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 where total kinetic energy is not conserved, meaning some energy is lost.
Non-contact Force A force that one object applies 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 force) at every point.
Weight The gravitational force exerted on an object.
Created by: user-2020866
 

 



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