Summary on The Concept of Force and Newton’s Laws of Motion
- Contact Forces: Require physical interaction between objects. Examples include applied force, friction, normal force, tension, air resistance, and spring force.
- Non-Contact Forces: Act over a distance without physical contact. Examples include gravitational, electromagnetic, strong nuclear and weak nuclear forces.
- Force: A push or pull that can change an object’s motion or shape.
- Newton’s First Law: Objects maintain their state of motion unless acted upon by an external force.
- Newton’s Second Law: Force equals mass times acceleration (F=ma).
- Newton’s Third Law: Every action has an equal and opposite reaction.