Force- a force in physics is any influence that causes an object to undergo a certain change, either concerning its movement, direction, or geometrical construction. When the interaction ceases, the two objects no longer experience the force. Forces only exist as a result of an interaction.
For simplicity sake, all forces (interactions) between objects can be placed into two broad categories:
contact forces, In physics, a contact force is a force that acts at the point of contact between two objects, in contrast to body forces. Contact forces are described by Newton's laws of motion, as with all other forces in dynamics
forces resulting from action-at-a-distance, are those types of forces that result even when the two interacting objects are not in physical contact with each other, yet are able to exert a push or pull despite their physical separation.
Contact Forces-Frictional Force, Tension Force, Normal Force, Air Resistance Force, Applied Force, Spring Force. Action-at-a-Distance- Gravitational Force, Electrical Force, Magnetic Force.
Learn about forces in action as you experiment how gradients, weights, motion and resistance affect the movement of various objects with this fun science activity.
Forces can change the shape of objects and change the way they are moving. Weight, pressure and turning moments are all the result of forces too.