| Question | Answer |
| How do we calculate it? | p(momentum) = m(ass) * v(elocity) |
| Average speed | The average over time when speed is changing |
| Define Speed | The distance an object moves per unit of time |
| What does a scalar quantity tell us? | Scalar quantities tell size OR magnitude of the thing measured |
| Instantaneous speed | Speed at any given moment in time like on your speedometer in the car |
| Define Distance | How far an object has moved |
| Velocity | Distance and direction an object moves per unit of time |
| Be able to calculate using the formula for Force | F = m* a |
| Advanced only: What is Impulse? | Force times time equals impulse |
| Which of these quantities is a scalar quantity, distance or displacement? | Distance is scalar; displacement is vector |
| Deceleration | Negative acceleration or speed that is decreasing/slowing down |
| What is momentum? | Momentum is the product of mass and velocity |
| What does a vector quantity tell us? | A vector quantity has both magnitude and direction. |
| State Newton’s First Law of Motion | When there is no unbalanced force on an object, objects at rest stay at rest and objects moving keep moving at the same speed in the same direction |
| What are 5 differences between mass and weight? | Mass is the amount of matter in something and weight is the pull of gravity. Mass is measure on a balance in g or kg and weight is measured on a spring scale in N. Mass cannot change or be zero and weight can. |
| Acceleration | Speed that is increasing or getting faster |
| What is the acceleration of gravity at the earth’s surface? | 9.85 m/s2 |
| Define Displacement | Distance and direction of an object from its starting point |
| Advanced only: Relate Impulse to momentum | Impulse is equal to the change in momentum. |
| State Newton’s Second Law of Motion | When an unbalanced force acts on an object it accelerates |
| What did Galileo determine about the rate of falling objects? | All objects fall at the same rate if there is little or no air resistance |
| Be able to calculate using the formula for momentum | p = m * v |
| Define Force | Any push or pull on an object |
| Advanced only: How does this relate to building safer cars? | When momentum changes quickly, Force can be minimized by extending the time it acts. Air bags, seat belts, and bumpers which crumple all work to allow extra time between the Force and its impact in a collision. |
| What are some other vector quantities? | Acceleration, force, and momentum |
| Mechanics | the study of motion |
| Which of these quantities is a vector quantity, Speed or velocity? | Velocity is vector; speed is scalar |
| Constant speed | Speed that is not changing or is staying the same |
