What is resistance?

Resistance is a force that opposes the motion of an object. It is like friction, but it happens in air instead of on a surface.

For example, when you try to push a ball through the air, the air resists your push. This is why the ball doesn't just fly through the air all by itself.

When you ride your bike, the air resistance makes it harder to pedal. This is why you have to pedal faster to go faster.

The air molecules are always moving around. When an object moves through the air, the air molecules have to move out of the way. This takes energy, which slows down the object.

The bigger and faster an object is, the more resistance it will have.

This is why it's harder to push a big ball through the air than a small ball. It's also why it's harder to ride your bike fast in a strong wind than in a light wind.

There are a few things you can do to reduce resistance:

• Make the object smaller.
• Make the object move slower.
• Make the object have a smooth surface.

For example, a golf ball has a dimpled surface, which helps to reduce air resistance. This is why a golf ball can travel so far when it's hit.

A race car has a smooth body, which also helps to reduce air resistance. This is why race cars can go so fast.

To sum up, resistance is a force that opposes the motion of an object. It is caused by the air molecules moving out of the way of the object. The bigger and faster an object is, the more resistance it will have. There are a few things you can do to reduce resistance, such as making the object smaller, moving it slower, or giving it a smooth surface.