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FORCE

In physics, a force is any interaction that, when unopposed, will change the motion of an object. In other words, a force can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate.

WEIGHT ON THE OTHER HAND IS A MEASURE OF THE PULL OF A PLANET I.E. EARTH ON THE STUFF CONTAINED IN THE OBJECT. THE DIRECTION OF THE FORCE OF GRAVITY IS DOWNWARDS TOWARDS THE CENTRE OF THE EARTH. AS MENTIONED EARLIER WHEN TWO OBJECTS INTERACT THEY EXERT EQUAL AND OPPOSITE FORCES.

EXAMPLE

TYPES OF FORCE

CONTACT

NON CONTACT

CONTACT FORCES Contact forces are just what they sound like: forces that result from the interaction of two objects in contact with each other. Forces that belong in this category are friction, air resistance, normal force, applied force, tension force, and spring force.

An applied force is a force that is applied to an object by another object. If you push a box across the floor, your force pushing on the box is the applied force. And remember how we said before that you can have multiple forces acting at once? You better believe that in addition to your applied force on the box, that box is also experiencing friction from the floor, gravity pulling it down, and the normal force pushing it up - all at the same time!

APPLIED FORCE

Tension force is the tension through a string or other fully-stretched object. If you tie something to a string and let it hang from your fingers, the tension force is the same for both the object at the end of the string and your fingers holding that string.

TENSION FORCE

The spring force is the force exerted by a compressed or stretched spring upon any object that is attached to it. An object that compresses or stretches a spring is always acted upon by a force that restores the object to its rest or equilibrium position.

SPRING FORCE

A non-contact force is a force applied to an object by another body that is not in direct contact with it. The most familiar example of a non-contact force is weight. In contrast a contact force is a force applied to a body by another body that is in contact with it.

NON CONTACT FORCES

The gravitational force is a force that attracts any object with mass. Every object, including you, is pulling on every other object in the entire universe! This is called Newton's Universal Law of Gravitation.

GRAVITATIONAL FORCE

Electric force is analogous to gravitational force: the attraction or repulsion between two particles is directly proportional to the charge of the two particles and inversely proportional to the square of the distance between them.

ELECTRIC FORCE

Magnetic force, attraction or repulsion that arises between electrically charged particles because of their motion. It is the basic force responsible for such effects as the action of electric motors and the attraction of magnets for iron.

MEGNETIC FORCE

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