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Forces/Newton's Laws
Newton's Laws
| Question | Answer |
|---|---|
| Newton's First law of motion is also known as ____. | Law of inertia |
| What does Newton's first law of motion state? | An object at rest will state at rest, or an object in motion will stay in motion unless a net force acts upon the object. |
| What is inertia? | resistance of an object to change its motion |
| What characteristic affects inertia? | mass of an object |
| What is Newton's Second law of motion? | When an unbalanced force is applied to an object, that object will accelerate; Force= mass x acceleration; |
| What are 3 ways an object can accelerate? | speed up, slow down, change direction |
| What would happen to acceleration if a smaller force is applied to an object? | The acceleration would be less |
| If the same force is applied to an object of lesser mass, that object's acceleration will _____ | be greater |
| What is Newton's Third law of Motion? | Every action force has a reaction force that is equal in size and acts in the opposite direction |
| Newton’s third law states that forces must ALWAYS occur in _________ | pairs |
| What is friction? | force that resists the sliding or rolling of one solid object over another |
| Friction at rest | static friction |
| Friction as surface slide across each other | sliding friction |
| This is the kind of friction when using wheels, cylinders, ball bearings | rolling friction |
| Friction involving liquid or gas | fluid fricton |
| Factors that affect the amount of friction | 1) surface roughness; 2) mass of an object |
| The factor that affect gravitational pull on an object ae_______ and ________. | mass and distance |
| What is acceleration due to gravity? | 9.8 meters per second per second |
| Would your mass change if you measured it on the moon? | no |
| Would your weight change if it was measured on the moon? | Yes, because the moon is smaller, it exerts less gravitational pull. |
| weight | the gravitational pull on an object. |
| What is a force? | A push or a pull |
| What unit is force measured in | Newtons abbreviation is N |
| What is a balanced force? | Forces cancel each other out and the object will not move. |
| What is an unbalanced force? | one force is greater than the other and the object ends up moving. |
| What is a net force? | When you have more than one force acting on an object, the forces are added together or subtracted depending on the direction of the forces |
| What is inertia? | Tendency to resist a change in motion The larger the mass the greater the inertia. |
Created by:
klaud