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Science Unit 4
| Question | Answer |
|---|---|
| What factors affect acceleration of an object? | Net force and mass |
| Describe an action/reaction situation. | Swimming and a rowing boat |
| What does an unbalanced force do to the object it's active on? | Makes it move |
| What does acceleration depend on? | An object's mass |
| What does a Newton measure? | Force |
| What are some ways to reduce friction? | Lubricants like oil and soap Decrease the surface area of an object |
| Why do things eventually fall on the ground? | Gravity |
| Describe friction. | Contact force When two objects rub against one another, _____ opposes their motion |
| Describe intertia. | The tendency of a moving object o keep moving in a straight line |
| Describe Netwon's laws. | Explains how forces affect the motion of objects |
| Describe Newton's first law of motion. | An object at rest tends to stay at rest unless acted upon by an unbalanced force |
| Describe Newton's second law of motion. | Acceleration depends on an object's mass and the amount of net force applied to it |
| Describe Newton's third law of motion. | When an object exerts a force on another, the second object exerts an equal force in the opposite direction |
| Define force. | Any push or pull on any object |
| Examples of static, sliding, and rolling friction. | Static - opposes the downward force of a book on a leaning desk, keeps the book in place Sliding - a big box slides when a force pushes on it Rolling - skates roll on the ground |
| Describe a balanced force acting on an object. | In tug-of-war, if both groups apply equal forces, the forces are balanced |
Created by:
blakelyk
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