Negative acceleration will result in a(n) In speed.

Negative acceleration, often called deceleration, means that an object is slowing down. For instance, if you're driving a car and you apply the brakes, the car experiences negative acceleration, thereby reducing its speed. It's like trying to catch a falling leaf—it gently slows down, instead of tumbling wildly. Now, think of negative acceleration like going uphill on a roller coaster. As you ascend, the ride slows down until it reaches the top. Once you go over the peak, you’ll speed up again! Understanding this concept helps in fields like physics and engineering, where controlling the speed of vehicles or machinery is crucial for safety and efficiency.