Force

Forces affect every moment of our life. Our bodies are held to the Earth by force, and they are held together by the forces of charged particles. When we open a door, walk down a street, lift a fork, or touch a baby's face, we are applying force. Our body's atoms are held together by electrical forces, and the core of an atom, called the nucleus...

We have studied the motion of objects earlier. What causes objects to move?

When a 'push' or a 'pull' is applied to it by another object, it moves. Such an interaction between objects or between an object and its surrounding is called a force.

To determine the force, we need to know how strong and in what direction it acts. Hence, ...