give two example each of contact and noncontact forces
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Force➫ Any interaction that when unopposed will change the motion of an object.
♦ It's SI unit is Newton (N).
♦ It has both magnitude & direction, making it a vector quantity.
♦ It can cause an object with mass to change its velocity to accelerate.
➊❭ Effects 0f Force are:-
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❱ It can make a stationary object move or change its position of rest.
♦Ex:- When you kick a stationary Football it will in motion.
❱ It can change the speed of a moving object.
♦Ex:- When goalkeeper applies force to stop the football.
❱ It can change the direction of motion of a moving object.
♦Ex:- When a batsman hits a ball.
❱ It can change the shape or size of an object.
♦Ex:- When you squeeze a sponge.
❷❭ Types 0f Force are:-
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❲1❳ Contact Force➫ A force that acts only when it is in contact with an object.
♦Ex:- Pushing a car up a hill.
❱ Types 0f Contact Force:-
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❱ Muscular➾ The force which is exerted by the muscle of your body.
♦Ex:- When you lift your School's Bag.
❱ Frictional➾ The force generated by two surfaces that contacts & slide against each other.
♦Ex:- A person sliding down a slide.
❲2❳ Non-Contact Force➫ A force that acts on an object without being in contact with it.
♦Ex:- Leaves falling from a tree.
❱ Types 0f Non-Contact Force:-
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❱ Gravitational➾ A force that attracts any two objects with mass.
♦Ex:- Leaves falling from trees.
❱ Magnetic➾ The force that arises due to the motion of charged particle within the magnetic field.
♦Ex:- Iron pin attracted to magnet.
❱ Electrostatic➾ The attraction or repulsion of particles or objects because of their electric charge.
♦Ex:- When you rub a comb in hair.
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Contact force:
When two items make direct physical contact, contact force occurs. For instance,
1. Tension force - An object is under tension when it is being pulled in two different directions.
2. Friction force - The resistance one surface experiences when moving over another surface is known as friction.
Non-contact force:
When two objects are drawn to or repelled by each other without coming into touch physically, this is known as a non-contact force. For instance,
1. Magnetic force - Magnetic forces are those felt when two things interact with a moving charge, whereas gravitational forces are those experienced when two bodies interact due to their masses.
2. Gravitational force - When two magnetic materials are brought together, they either attract or repel one another depending on their pole positions. This is known as a magnetic force.
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