Speed is not a measure of how fast something moves <u>in</u> a specific direction. It is just the average speed per time unit without a direction. A direction is for velocity. The answer is false. I hope this helps. :)
When objects collide, energy can be transferred from one object to another, thereby changing their motion. In such collisions, some energy is typically also transferred to the surrounding air; as a result, the air gets heated and sound is produced.
