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Force and Motion
| Term | Definition |
|---|---|
| Force | A push or a pull. |
| What are the 2 things forces have? | Magnitude and Direction. |
| What are the 4 ways forces can AFFECT an object? | stay in place, accelerate, slow down, and change shape. |
| 3 examples of CONTACT forces? | frictional, normal, and spring |
| 3 examples of NON-CONTACT forces? | gravitational, magnetic, and electric |
| What are the 3 types of forces? | friction, gravity, and inertia |
| What is friction? | when 2 moving surfaces contact or rub against each other. |
| What does friction do to an object? | reduces the speed of an object. |
| What is gravity? | a natural force that pulls down objects. |
| What happens when a person jumps upward? | Gravity pulls them downward. |
| What is inertia? | the tendency of an object to resist a change in motion. |
| The heavier an object, the more ______ it has. | interia |
| What is the First Law of Motion? (Law of Intertia) | An object at rest stays at rest. If an object is in motion, it will continue to move at the same velocity unless acted upon by an unbalanced force. |
| What is the Second Law of Motion? | F = ma |
| What is the Third Law of Motion? | Every action has an equal and opposite reaction. |
| What is the action? | The force exerted by the first object on the second is referred to as action. |
| What is reaction? | The reaction force is the force [applied[ by the second body on the first body. |
| Pushing down on the trampoline Trampoline propelling the person upward | Action Reaction |
| What happens when forces are balanced? | If the forces acting on a still object are balanced, the object will not move. |
| What are the 3 characteristics of balanced forces? | Equal in size, opposite in direction, does not change motion. |
| What do unbalanced forces always do? | change motion. |
| How can forces be identified as unbalanced? | When an object's net force exceeds zero. (applies if the forces are moving in the same or opposite direction) |
| What is the net force? | The total amount of all forces applied to an object. |
| What is speed? | the rate at which an object moves distance/time |
| What is velocity? | speed + direction |
| What is acceleration? | the rate at which velocity changes. the change of speed or direction. |
| If an object is speeding up, it is ____ | accelerating |
| If an object is slowing down, it is ____ | decelerating |
Created by:
Beia Aria
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