Question

1. how is average speed different from instantaneous speed? ch. 3.3 11. why is velocity a vector quantity? 12. why is speed a scalar quantity? 13. what is constant velocity? 14. how does velocity change? 15. what is the difference between speed and velocity?

Explanation:

1. Average speed is total distance over total time, while instantaneous speed is speed at a specific moment.
2. Velocity has both magnitude and direction, which are characteristics of vector quantities.
3. Speed only has magnitude and no direction, making it a scalar quantity.
4. Constant velocity means both the speed and direction of an object's motion remain unchanged.
5. Velocity changes when there is a change in speed, direction, or both, which is caused by acceleration.
6. Speed is a scalar representing how fast an object is moving, while velocity is a vector that includes both the speed and the direction of motion.

Answer:

1. Average speed is total - distance over total - time; instantaneous speed is at a moment.
2. It has magnitude and direction.
3. It has only magnitude.
4. Unchanging speed and direction.
5. Change in speed, direction, or both.
6. Speed is scalar, velocity is vector with direction.