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PS Module 1

Forces and Motion

QuestionAnswer
Reference point The starting point you choose to describe the location or position of an object
Position An objects 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 a pull on an object
Newtons second law of motion States that the acceleration of an object equals the net force on the object divided by the objects 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
Newtons first law of motion States that an object in motion will stay in motion, and an object at rest will stay at rest, unless acted on by a force
Newtons third law of motion States that 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 force is two objects apply to each other
Normal force The force that pushes perpendicular to the object surface
Elastic collision When colliding objects bounce off each other
Noncontact force A force that one object can apply to another object without touching it
Gravity And attractive force that exist between all objects that have mass
Field A region of space that has a physical quantity, such as a Force, at every point
Weight Are the gravitational force exerted on an object
Contact force A push, or a pull on one object by another object that is touching it
Created by: Jergertigers
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