| A | B |
|---|
| Force | push or pull |
| Newton | unit of measure for measuring the push/pull of FORCE |
| Metric unit of WEIGHT | Newton |
| Size & Direction | foces like velocities have these characteristics |
| When a single force is applied to an object | the object's motion is changed |
| BALANCED | If a force is opposed by an equal force in an opposite direction |
| Motion is NOT changes | when the forces are balanced |
| Friction | the force that opposes motion between two surfaces that are touching |
| Amount of friction between two suraces depends on | how hard the surfaces are being pushed and what the materials are made of |
| Drag | friction between a solid surface and a fuild such as a liquid or gas |
| Air Resistance | when friction happens between a solid surface and air |
| Newtons Law #1 | Law of Inertia: an object remains in a state of rest or in constant motion in a straight line UNLESS acted on by an external, unbalanced force (net force) |
| Inertia | resistance to a change in motion |
| Weight is a measure of the force of | gravity |
| Kg (Kilograms) | metric unit of mass |
| N (newton) | metric unit of weight |
| On the moon, your weight will be | different |
| On the moon, your mass will be | the same |
| Newtons Law #2 | Force = Mass X Accerleration |
| Newtons Law #3 | for every force there is an equal but opposite reaction force |
| Friction is a | force which opposes motion and causes objects to slow down and stop |
| ONLY unbalanced forces can | cause motion |
| In the absence of motion, an object will | continue to move in a straight line at constant speed. |
| Hovercraft and the fact that there is no friction show which of Newton's laws? | Law #1 |
| Galileo's discovery was | if gravity is the only force acting, all objects fall at the same rate |
| When 1 object pushes on a 2nd object, the 2nd object pushes back on the 1st with an equal but opposite force. Which of Newton's laws is this? | Law #3 |
