* A change in speed: The object is speeding up or slowing down.
* A change in direction: The object is changing its direction of motion, even if its speed remains constant.
Key Points:
* Acceleration is a vector quantity: It has both magnitude (how much the velocity changes) and direction (the direction of the change).
* Constant velocity means no acceleration: If an object is moving at a constant speed in a straight line, it is not accelerating.
* Examples of acceleration:
* A car speeding up from a stoplight.
* A ball thrown upwards slowing down as it rises.
* A car turning a corner at constant speed.
* A satellite orbiting the Earth at a constant speed.
The relationship between acceleration, velocity, and time is described by the following formula:
* Acceleration (a) = (Change in Velocity (Δv)) / Time (Δt)
This means that the acceleration of an object is equal to the change in its velocity divided by the time it takes for that change to occur.
