What are forces?

This can be any driving force, it may be a push or pull, but it could be an engine which forces an object forward.

This is the force required to raise an object through a fluid

This is a force which acts in the air, it can slow objects down when they are moving against it. Or if harnessed could be used to move an object along.

This force acts on objects when they are in contact with a surface, such as the ground. It can be reduced by ensuring both surfaces are smooth.

This force affects every object on Earth. It is a force which pulls everything to the centre of the Earth.

This is an upward force which acts in water, it acts on an object against gravity and is why certain objects float.