8th Grade Physical Science - Forces and Motion
Covers:
- Basic force and motion vocabulary
- How forces work
- Gravity and mass
- Newton's Laws
- Acceleration
- Formulas
- Speed and Velocity
Terms : Hide Images
| 222258344 | force | A push or pull on an object that may or may not cause motion, has a size and direction | |
| 222258345 | velocity | the speed of an object in a particular direction | |
| 222258346 | net force | the combination of all forces acting on an object | |
| 222258347 | newton | the SI unit of force | |
| 222258348 | acceleration | the rate at which velocity changes over time, the rate at which velocity changes over time; an object accelerates if its speed, direction, or both change | |
| 222258349 | Example of acceleration | a boulder rolling down a hill faster | |
| 222258350 | balanced forces | 2 or more forces exerted on an object that cancel each other out and don't cause a change in motion | |
| 222258351 | unbalanced forces | 2 or more forces exerted on an object that can cause an object to change in motion in a certain direction | |
| 222258352 | gravity | the force of attraction between all masses in the universe | |
| 222258353 | friction | the force that opposes the motion of one surface as it moves across another surface | |
| 222258354 | Decrease friction | adding lubricants | |
| 222258355 | Increase friction | have rougher surfaces; i.e. sandpaper | |
| 222258356 | kinetic friction | friction between moving surfaces | |
| 222258357 | static friction | friction between non-moving surfaces | |
| 222258358 | Newton's 1st Law | an object at rest will stay at rest; an object in motion will stay in motion; unless acted by an outside force | |
| 222258359 | Newton's 1st Law (2nd way of calling it) | Intertia | |
| 222258360 | Newton's 2nd Law | Force is mass times acceleration; an objects acceleration depends on the mass of the object and the size and direction of the force acting upon it | |
| 222258361 | Newton's 3rd Law | Every action force has an opposite, and equal reaction force | |
| 222258362 | fluid friction | friction that occurs as an object moves through a fluid | |
| 222258363 | sliding friction | friction that occurs when one solid surface slides over another | |
| 223138046 | motion | an object's change in position relative to a reference point | |
| 223138047 | speed | the rate at which an object moves | |
| 223138048 | Average speed formula | total distance/total time | |
| 223138049 | Negative acceleration | deceleration |
