Force and its types
- 2. What causesthingsto move? Forces What is a force? A push or a pull that one body exerts on another.
- 4. EXAMPLESOFFORCE • Fingers open a book. • Push buttons on keyboard. • Gravity holds up a chair. • Two magnets coming together. VISIBLE FORCES INVISIBLE FORCES
- 5. ORIGINOFFORCE • Forces are due to an interaction. An interaction of one object results force between the two objects.
- 6. Newtons • It is represented by the ‘F’. • Force is measured by S.I units. • S.I units of force is NEWTON. • Therefore, 1N = 1 kg • m s2
- 8. •Contact forces •Non- contact forces •Electrostatic forces •Gravitational forces
- 9. CONTACTFORCES • Contact forces are those that cause change in another object because the objects are physically touching one another. • This type of force is also known as MUSCULAR FORCES. • Example: pull the baby
- 10. NON-CONTACTFORCES • A non- contact force occurs when the forces acts from the distance. • Example: magnet
- 11. ELECTROSTATICFORCES • The force exerted by a charged body on another charged body is known as electrostatic forces. • example: rubbing a comb on hair attract pieces of paper.
- 12. GRAVITATIONAL FORCES • The objects or things falls towards the earth because gravity pulls them downward is known as gravitational forces. • This is also known as newton’s law of gravitation. • Example: apple falling from tree