1. Car braking: When you press the brake pedal in your car, you apply a force that slows the car down. This force causes a deceleration (negative acceleration) that acts opposite to the car's direction of motion.
2. Throwing a ball upwards: As a ball travels upwards, gravity acts on it, slowing it down. This means acceleration due to gravity is acting in the opposite direction to the ball's motion.
3. A parachutist descending: A parachutist falling towards the earth experiences air resistance, which acts upwards, opposite to the direction of their motion. This force causes a deceleration, slowing the descent.
4. A boat slowing down in the water: When a boat's engine is cut off, it continues to move forward, but water resistance acts against its motion, causing it to slow down. This slowing down represents acceleration in the opposite direction to the boat's velocity.
5. A rolling ball coming to a stop: A ball rolling across a surface will eventually stop due to friction. This friction acts opposite to the ball's motion, causing deceleration and eventually bringing it to a halt.
Remember: Acceleration is a change in velocity. If the velocity is decreasing, the acceleration is in the opposite direction of motion. This is often referred to as "deceleration."
