| Question | Answer |
| Newton's First Law | An object at rest tends to stay at rest and an object in motion tends to stay in motion unless acted upon by an outside force. "Inertia" |
| Newton's Second Law | An object acted upon by a force will accelerate in the direction of the force. |
| Newton's Third Law | For every action there is an equal and opposite reaction. |
| Speed Formula | speed equals distance divided my time (m/s) |
| Acceleration Formula | final speed minus initial speed divided my time (m/s2) |
| Momentum Formula | mass times velocity (p=mv) |
| Change in Velocity Formula | change in velocity equals gravitational force times time |
| Momentum | a measure of how hard it is to stop an object |
| Weightlessness | when an objects weight "seems" to be zero because gravity "seems" to be absent |
| When you push on a wall... | the wall pushes back on you with the same amount of force |
| What type of pairs are used constantly when you move? | action-reation pairs |
| When the action-reaction force not noticeable? | when the mass of an object is considerably larger than the mass of another object |
| Why does a boat move backward when you jump off of the boat to a pier? | You push off of the boat, causing it to move backwards, The boat pushes up on you, causing you to move forward. |
| Every piece of matter in the universe has some... | gravity |
| Gravity always pulls toward the ____ of an object | center |
| What 3 things do weight come from? | Our mass, Earth's mass, and gravity |
| Gravity | The force of attraction between objects that is due to their masses. |
| Gravitational Constant | 9.8 m/s2 |
| Weight | the gravitational force between an object and Earth |
| Center of Mass | point where all the mass of an objects is concentrated |
| Galileo Galilei | Italian scientist who formulated laws of falling objects (gravity) |
| Force Formula | force equals mass times acceleration |
| Mass Formula | mass equals force over acceleration |
| Acceleration Formula | acceleration equals force times mass |
| Everything in the universe is in... | motion |
| What puts things in motion? | force |
| When an object is moving it keeps moving unless acted upon by an ____ ____ | outside force |
| Whether an object is moving or sitting still, everything has ______ | inertia |
| Gravitational force is also called ______ | weight |
| Weight is a ____ | force (N) |
| Mass is.. | the amount of matter in an object (kg) |
| Centripetal Force | for exerted toward the center of the circle that keeps on object moving in a circular motion |
| Terminal Velocity | reached when the force of gravity is equal to the air resistance |
| Force | push or pull exerted on an object in oder to change its motion |
| Net Force | combination of all of the forces acting on an object |
| Balanced Forces | 2 or more forces whose effects cancel each other out and do not change the motion of an object |
| Unbalanced Forces | 2 or more forces acting on an object that don't cancel and cause the object to accelerate |
| Sir Isaac Newton | English scientist/mathematician who studied and explained the 3 laws of motion |
| Friction | force that occurs when one surface rubs against another |
| What can work into heat? | friction |
| Knots are held together by what? | friction |
| Where is there almost no friction? | outer space |
| What do sliding and static friction have in common? | They both stop objects from moving or keep an object at rest. |
| What factors cause static friction between two surfaces to increase? | microscopic roughness and mass |
| What is the difference between sliding and static friction? | Static friction keeps an object at rest while sliding friction slows an object that slides |
| When was Isaac Newton born? | In England; Christmas Day 1642- March 30, 1726 |
| What mathematics did Newton create? | calculus |
| Newton's published book was called.... | Principia Mathematica |
