click below
click below
Normal Size Small Size show me how
Chapter 10
| Question | Answer |
|---|---|
| Force | Push or pull |
| Newtons | SI unites |
| Net force | Combined forces |
| Unbalanced Force | Cause motion, net for is not 0 |
| Balanced Force | Same amount of force in opposite directions |
| Friction | 2 surfaces exert pressure on each other |
| Static | Not Moving |
| Sliding | Slide over each other |
| Fluid | Solid object moves through liquid |
| Rolling | Rolls across a surface |
| Gravity | force that pulls objects towards e/o |
| Mass | the amount of matter in an object |
| Weight | the amount of gravity on an object |
| Free Fall | force of gravity alone causes an obj to accelerate |
| Air Resistance | fluid friction of air acts on obj falling |
| Projectile | an obj that is thrown will fall just as fast as obj dropped, will hit ground at same time. |
| Elastic Forces | if it returns to its original shape after it is squeezed or streched |
| 1st Law of Motion | obj. at rest will stay at rest and obj. in motion will stay in motion unless force acts on it |
| Inertia | is the tendency of an obj to resist change in motion. |
| 2nd Law of Motion | Changes in force and mass = change in ACCELERATION |
| Accleration | the rate of change of velocity of an object. |
| Action - Reaction Pair | 2 objects exert forces on each other |
| 3rd Law of Motion | one obj exerts force on a second obj, the second exerts a force equal in the oppo direction |
| Momentum | mass x velocity (quantity of motion) |
| Law of Conservation of momentum | total momentum of obj that interact does not change… just transfers from one obj to another |