List and explain a few forces that change motion.
1. Friction: Friction is a force that opposes the motion of an object when it is in contact with a surface. It can act to slow down or stop an object's motion. For example, when a car applies brakes, the friction between the tires and the road surface slows down the car.
2. Gravity: Gravity is a force that pulls objects towards each other. It affects the motion of objects by causing them to accelerate towards the Earth. For example, when you throw a ball in the air, gravity pulls it back down to the ground.
3. Air resistance: Air resistance is a force that opposes the motion of an object as it moves through the air. It can slow down the motion of objects such as cars, airplanes, and projectiles. For example, when a skydiver jumps out of a plane, air resistance slows down their fall.
4. Tension: Tension is a force exerted by a stretched or pulled object, such as a rope or a spring, in order to return to its original shape. It can affect the motion of objects by either supporting or hindering their movement. For example, tension in a rope can help to pull an object upwards or slow down its descent.