* Imagine a ball thrown straight up in the air. At the very top of its trajectory, for a brief moment, the ball's velocity is zero. However, gravity is still acting on it, causing a constant downward acceleration.
Key Points:
* Velocity is a measure of how fast something is moving *and* in what direction.
* Acceleration is the rate of change of velocity. It tells you how quickly the velocity is changing.
Example:
A car at rest (zero velocity) can suddenly accelerate forward. It's experiencing acceleration even though it starts from a standstill.
In short: While a body with zero velocity is not moving at that instant, it can still be accelerating. This means that its velocity is about to change, and it will start moving.
