Question

What is the difference between contact and noncontact force? Explain with one example of each.

Answer 1

Contact forces are those forces that act on bodies when they are in contact 'Physically'.
For exame- Boy pushing a block of wood.

Non contact forces are those forces in which the force acts on the bodies even when they are not in contact.
For example- Gravitational force.

Answer 2

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▶No, It can change.
If you apply a balanced force then their resultant force is 0.

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:-
▬▬▬▬▬▬▬▬▬▬▬▬▬⤵

❱ 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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