Anything (or anyone) that pushes an object is called a force.Objects do not move by themselves. Anything that pushes or pulls an object is called a force. A breath of wind, a car engine, a magnet or an elastic band are all examples of things that can produce a force. Gravity is an important force. You can see it at work if you let a pen drop. The pen is being pulled towards a very large object, the Earth itself.
Direct or distant force?
Some forces work when an object is pushed or pulled by another. This is a direct force. Other forces make things move without touching them. One example is gravity: the pen drops to the ground by an unseen force. Another is magnetism: a magnet can pull a piece of iron towards it without touching it. These are called distant forces.
The force that slows an object down as it travels through a gas or liquid is called drag. This occurs because of friction between the object and the molecules around it.
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