Exploring Forces

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A force is a push or pull applied on an object resulting from the object's interaction with another object. The SI unit of force is newton, written with a small 'n' and its symbol is N.

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1. Make an object move from rest 2. Change the speed of a moving object 3. Change the direction of motion of an object 4. Bring about a change in the shape of an object

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Forces result from interaction between objects. At least two objects must interact for a force to come into play. For example, when you push a table, your hand (one object) applies force on the table

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Contact forces are forces that act only when there is physical contact between the objects. Examples: 1. Muscular force - when we push or pull something with our hands 2. Friction - when objects rub a

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Muscular force is the force resulting from the action of muscles when they contract and elongate. It helps in: 1. External activities like walking, running, lifting 2. Internal functions like chewing

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Friction is the force that comes into play when an object moves or tries to move over another surface. It is a contact force that always acts in a direction opposite to the direction in which the obje

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Friction arises due to irregularities in the two surfaces in contact. Even smooth-looking surfaces have many minute irregularities. When surfaces are in contact, these irregularities lock into each ot

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The force of friction depends on the nature of surfaces in contact. Friction is greater on rough surfaces compared to smooth surfaces. For example, a ball will stop sooner when rolling on a rough road