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Speed
Students review Speed Concepts and Calculations
| Question | Answer |
|---|---|
| The rate at which an object moves is its ________________________________. | speed |
| When an object changes position over time, compared to a reference point, the object is in _______________________. | motion |
| Average speed is determined by dividing total ___________________ by total ________________. | distance, time |
| The ________________ of an object is the rate of change of its position. | velocity |
| Velocity can change if a vehicle speeds up from 15 m/s (meters per second) south to 20 m/s south, but also if the bus travels at the same speed in a _____________________ direction. | different |
| When you combine two velocities that are in the same direction, you find the __________________ velocity. | resultant |
| When you combine two velocities that are in opposite directions, you subtract the larger from the smaller velocity to determine the ___________________ velocity. | resultant |
| What two things must you know to determine speed? | time, distance |
| The difference between speed and velocity is _________________________. | direction |
| The rate at which velocity changes is called ____________________. | acceleration |
| Velocity changes if ______________ changes, ___________________ changes or both. | speed, direction |
| Velocity is measured in __________________. | m/s (meters per second) |
| Acceleration is expressed in ________________. | m/s/s |
| Negative acceleration is also called __________________________. | deceleration |
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