* Acceleration is a change in velocity. Velocity is a combination of speed and direction.
* An object can slow down (decrease in speed) without changing direction, which means its velocity is still changing. Since acceleration is a change in velocity, the object is still accelerating.
* The key is that acceleration is a vector quantity. This means it has both magnitude (how much) and direction. When an object slows down, its acceleration is in the opposite direction of its motion.
Think of it like this:
* Imagine you're driving a car and you hit the brakes. You are slowing down, but you are also accelerating in the opposite direction of your motion. This is why you feel pushed forward when you brake.
Let's look at a few examples:
* A ball thrown straight up: As the ball goes up, its speed decreases, and it is accelerating downwards due to gravity.
* A car braking to a stop: The car is slowing down (decreasing speed) and accelerating in the opposite direction of its motion.
In summary:
* An object can slow down and still have acceleration because acceleration is a change in velocity, which can be a change in speed, a change in direction, or both.
* When an object slows down, its acceleration is in the opposite direction of its motion.
