The video tutorial explains the concept of force, measured in Newtons, as a push or pull on an object due to interaction with another object. It distinguishes between contact and non-contact forces. Contact forces require physical touch, such as friction and tension, while non-contact forces, like gravity and magnetism, act over a distance. The video also highlights that forces are vector quantities, having both magnitude and direction.

Describe the concept of normal contact force.

How does gravitational force act between two objects?