Examples of non-constant speed:
* A car accelerating from a stop sign: The car's speed increases as it moves forward.
* A ball thrown upwards: The ball's speed decreases as it travels upward due to gravity, and then increases as it falls back down.
* A roller coaster: The speed of a roller coaster constantly changes as it goes up and down hills and around curves.
Key Characteristics of Non-Constant Speed:
* Variable velocity: Velocity includes both speed and direction. When speed changes, velocity also changes.
* Presence of acceleration: Acceleration is the rate of change of velocity. Non-constant speed implies the presence of acceleration.
* Uneven distance traveled in equal time intervals: If an object is moving at non-constant speed, it will cover different distances in the same amount of time.
Contrast with Constant Speed:
In contrast to non-constant speed, constant speed means that an object's speed remains the same over time. This means there is no acceleration or deceleration.
In summary:
Non-constant speed refers to a situation where an object's speed is changing over time. It is characterized by variable velocity and the presence of acceleration. This is in contrast to constant speed, where the speed remains the same.
