1. Distance is a measure of how far an object has traveled from its starting point, regardless of direction.
2. Distance is measured in meters (m), kilometers (km), centimeters (cm), or other units of length.
3. Speed is a measure of how fast an object is moving, defined as the distance traveled per unit of time.
4. Speed is measured in meters per second (m/s), kilometers per hour (km/h), or other units of distance per unit of time.
5. The equation that connects Speed, Distance, and Time is: Speed = Distance / Time.
6. The speed of an object that is stationary is 0 m/s (or 0 in any unit of speed).
7. Distance is measured in meters (m), kilometers (km), centimeters (cm), or other units of length.
8. Speed is a scalar quantity (magnitude only), while Velocity is a vector quantity (magnitude and direction).
9. The equation that connects Velocity, Distance, and Time is: Velocity = Displacement / Time. (Note: For constant velocity in a straight line, this simplifies to Velocity = Distance / Time if direction is implied).
10. If an object travels 25 meters in 5 seconds, its Velocity is 5 m/s (assuming straight-line motion in one direction).
11. Constant Velocity means the object is moving at a steady speed in a straight line without changing direction.
12. Acceleration is the rate at which an object’s velocity changes over time.
13. Acceleration is measured in meters per second squared (m/s²) or other units of velocity per unit of time.
14. The equation that connects Acceleration, Velocity, and Time is: Acceleration = Change in Velocity / Time.
15. Negative Acceleration is sometimes called Deceleration (when it refers to slowing down) or Retardation.
16. A car changes from 10 m/s to 30 m/s in 8 seconds. Its Acceleration is (30 - 10) / 8 = 20 / 8 = 2.5 m/s².
17. A bicycle moving at 10 m/s stops in 10 seconds. Its Acceleration is (0 - 10) / 10 = -10 / 10 = -1 m/s².
Parent Tip: Review the logic above to help your child master the concept of force and motion worksheet 8th grade.
