| A | B |
|---|
| The first law of motion says that an object at rest will remain at rest unless | an outside force acts on it |
| According to the third law of motion, for every action there is | an equal or opposite reaction |
| When you observe an object, how do you know if it is moving? | Its position changes |
| Two byciclists ride north at the speed have... | the same velocity |
| The brakes on an adult bicycle must be stronger than the brakes on a children's bicycle because | an adult rider will have more momentum |
| A force has more effect on an object with | less mass |
| This explains why people in a car move forward in their seats when the car stops quickly. | inertia |
