Force:
(i) Force may be a push or a pull.
(ii) Living and non- living things can apply force.
(iii) to use a force over an object interaction between object and source of force is critical.
(iv) Whenever force act two object are involved. One which applied force, the opposite which receive force.
Examples: To kick ball we'd like to push it, to select the book we'd like to tug it, to hit the ball we'd like to push it and to lift the box we'd like to push it.
Direction and Magnitude of Force:
(i) The measurement of strength and amount of force is termed magnitude of force.
(ii) Two or more forces on the identical object may be applied within the same direction and other way.
1. When two or more forces are applied over an object within the same direction:
When two or more forces are applied within the same direction, then the whole or net force is that the addition of magnitude of both the forces.
Example: When two persons push the hold in the identical direction with the magnitude of forces of every 2 N, then resultant force will be-
Net force:- 2N + 2N= 4N (In the direction of applied force)
2. When two forces are applied over an object within the alternative direction:
When two forces are applied over an object within the alternative directions, the full effective or net force is that the difference of magnitude of two forces.
Example:
(i) When two persons push the hold within the alternative direction with the magnitude of forces of each 2 N, then resultant force will be-
Net force:- 2N - 2N= 0N (Box won't move)
(ii) If one person is applying a force of 6 unit in one direction and another person is applying a force of 8 unit in other way,
Then the resultant force: 8N - 6N= 2N (In the direction of upper magnitude force)
In this case, force will act within the direction of upper magnitude of force.
Effect of Forces:-
1. Force can change the state of motion: An Object is also in two states.
(a) Rest State: When an object isn't moving. this suggests a stationary object is termed within the state of rest. as an example –A ball and book kept over the underside and not moving.
(b) Motion State: A moving object is termed within the state of motion. as an example – a moving car, a moving ball, etc.
A Force can move a stationary object. A force can speed up, decrease the speed and alter the direction of a moving object. Force can stop a moving object. Finally we are ready to say that force can change the state of motion
Some examples:
(i) A boy want to maneuver a tyre faster it's to be pushed repeatedly.
(ii) Change within the direction of moving ball after it strikes the ruler placed in its path.
(iii) within the football, a goalkeeper stops the football going towards the goal post by applying a force by his hand.
(iv) within the cricket game, a batsman can push a quick moving ball within the same direction or other way or change the direction of the movement of ball. thanks to force being applied from his bat.
2. Force can change the form of an object:
(i) once you apply force on an inflated balloon by pressing it using your hand from each side, then the force of pressure changes the form of balloon.
(ii) you'll be able to change the form of elastic band and spring by stretching it in other way.
(iii)You can change the form of dough into bread by applying force with a kitchen utensil.
So we will say that forces can change the form of an object.
Types of Force:
1. Contact Force:
(a) For contact force, interaction between objects is critical. Force that comes into action after the interaction between objects is named contact force. Contact force works on the purpose of contact. Example; pushing a car, hitting the ball, kicking a ball, etc.
(b) Muscular force, friction force are styles of contact force.
(a) Muscular force:
(i) Force thanks to the action of muscles is named muscular force. we will say force resulting thanks to action of muscle is named muscular force.
(ii) Muscular force is applied only after interaction with the item.
Examples:
(a) after we push the item like school bag or lift the bucket of water we use the muscular force.
(b) Animals also use of muscular force to hold out their task.
(b) Friction Force:
(i) The forces of friction arises between the surfaces of two objects
(ii) The force of friction always acts on all moving object and its direction is usually opposite to the direction of motion.
(iii)Force of friction comes into action only after interaction between two objects, thus, it's a sort of contact force.Examples:
(a) thanks to force of friction between the surface of the ball and therefore the ground that brings the moving ball to rest.
(b) after we stop pedalling a bicycle, it gradually cut down and at last involves s stop thanks to force of friction.
2. Non- Contacting Force:
(i) Force thanks to without interaction between two objects is named non-contact force. For example; a magnet can pull an iron nail from a distance.
(ii) magnetism, Electrostatic force and gravitation are samples of non-contact force.
(a) Magnetic Force:
(i) A magnet can exert a force on another magnet without being to bear with it.
(ii) The force exerted by a magnet is an example of a non-contact force.
Example: Opposite pole of two magnets attract one another and same pole repel one another.
(b) Electrostatic Force:
(i)When a charged body exert a force on another charged or uncharged body is named electrostatic force.
A charged body attracts an uncharged body.
(ii) A charged body attracts a charged body and repels a charged body without coming to bear, thus it's a non-contact force.
(c) Gravitational Force:
(i) Gravitation force is exerted by earth, moon, sun and other planets to others.
(ii) Earth and other planets attract all objects towards them. Since, earth attracts all objects even without coming to bear, thus gravitation may be a non-contact force.
Example: after we release an object from a height, it falls over the bottom thanks to gravitational attraction of earth.
Pressure:
The force performing on per unit area of a surface is named pressure. we will say force per unit area is named pressure.
Pressure = Force / Area
From above formula, we will say that with same applied force, Pressure is indirectly proportional to the realm, thus pressure decreases with increase in area and increases with decrease in area.
Example:
(i) after we cut an apple, we'd like to use the sharp fringe of the knife rather than blunt knife because the sharp fringe of knife has small extent and that we have to exert less force with high to chop the apple.
(ii) after we put a nail into a wooden board, the pointed end of the nail is kept at the front. The pointed end of the nail has very small extent and this allows us to use a greater pressure with the applied force.
Pressure exerted by Liquid and Gas:
(i) Liquid and gas may also exert pressure on inner walls of the container during which they're kept.
(ii) When air is filled, a rubber balloon gets inflated from all sides. This happens thanks to air or gas exerts pressure over inner walls of the balloon.
(iii) Water starts leaking if there's a pore within the bottle. This happens thanks to water exerts pressure over the walls of the bottle.
Atmospheric Pressure:
(i) Our atmosphere is formed of various styles of gases. Since gases exert pressure, thus Pressure exerted by air (present in atmosphere) is named air pressure.
(ii) the burden of air in an exceedingly column of the peak of the atmosphere and area 10 cm × 10 cm is as large as 1000 kg. the explanation we aren't crushed under this weight is that the pressure inside our bodies is additionally adequate to the air pressure and cancels the pressure from outside.
(iii) A pressed rubber sucker on a plane surface doesn't come off thanks to air pressure.
(i) Force may be a push or a pull.
(ii) Living and non- living things can apply force.
(iii) to use a force over an object interaction between object and source of force is critical.
(iv) Whenever force act two object are involved. One which applied force, the opposite which receive force.
Examples: To kick ball we'd like to push it, to select the book we'd like to tug it, to hit the ball we'd like to push it and to lift the box we'd like to push it.
Direction and Magnitude of Force:
(i) The measurement of strength and amount of force is termed magnitude of force.
(ii) Two or more forces on the identical object may be applied within the same direction and other way.
1. When two or more forces are applied over an object within the same direction:
When two or more forces are applied within the same direction, then the whole or net force is that the addition of magnitude of both the forces.
Example: When two persons push the hold in the identical direction with the magnitude of forces of every 2 N, then resultant force will be-
Net force:- 2N + 2N= 4N (In the direction of applied force)
2. When two forces are applied over an object within the alternative direction:
When two forces are applied over an object within the alternative directions, the full effective or net force is that the difference of magnitude of two forces.
Example:
(i) When two persons push the hold within the alternative direction with the magnitude of forces of each 2 N, then resultant force will be-
Net force:- 2N - 2N= 0N (Box won't move)
(ii) If one person is applying a force of 6 unit in one direction and another person is applying a force of 8 unit in other way,
Then the resultant force: 8N - 6N= 2N (In the direction of upper magnitude force)
In this case, force will act within the direction of upper magnitude of force.
Effect of Forces:-
1. Force can change the state of motion: An Object is also in two states.
(a) Rest State: When an object isn't moving. this suggests a stationary object is termed within the state of rest. as an example –A ball and book kept over the underside and not moving.
(b) Motion State: A moving object is termed within the state of motion. as an example – a moving car, a moving ball, etc.
A Force can move a stationary object. A force can speed up, decrease the speed and alter the direction of a moving object. Force can stop a moving object. Finally we are ready to say that force can change the state of motion
Some examples:
(i) A boy want to maneuver a tyre faster it's to be pushed repeatedly.
(ii) Change within the direction of moving ball after it strikes the ruler placed in its path.
(iii) within the football, a goalkeeper stops the football going towards the goal post by applying a force by his hand.
(iv) within the cricket game, a batsman can push a quick moving ball within the same direction or other way or change the direction of the movement of ball. thanks to force being applied from his bat.
2. Force can change the form of an object:
(i) once you apply force on an inflated balloon by pressing it using your hand from each side, then the force of pressure changes the form of balloon.
(ii) you'll be able to change the form of elastic band and spring by stretching it in other way.
(iii)You can change the form of dough into bread by applying force with a kitchen utensil.
So we will say that forces can change the form of an object.
Types of Force:
1. Contact Force:
(a) For contact force, interaction between objects is critical. Force that comes into action after the interaction between objects is named contact force. Contact force works on the purpose of contact. Example; pushing a car, hitting the ball, kicking a ball, etc.
(b) Muscular force, friction force are styles of contact force.
(a) Muscular force:
(i) Force thanks to the action of muscles is named muscular force. we will say force resulting thanks to action of muscle is named muscular force.
(ii) Muscular force is applied only after interaction with the item.
Examples:
(a) after we push the item like school bag or lift the bucket of water we use the muscular force.
(b) Animals also use of muscular force to hold out their task.
(b) Friction Force:
(i) The forces of friction arises between the surfaces of two objects
(ii) The force of friction always acts on all moving object and its direction is usually opposite to the direction of motion.
(iii)Force of friction comes into action only after interaction between two objects, thus, it's a sort of contact force.Examples:
(a) thanks to force of friction between the surface of the ball and therefore the ground that brings the moving ball to rest.
(b) after we stop pedalling a bicycle, it gradually cut down and at last involves s stop thanks to force of friction.
2. Non- Contacting Force:
(i) Force thanks to without interaction between two objects is named non-contact force. For example; a magnet can pull an iron nail from a distance.
(ii) magnetism, Electrostatic force and gravitation are samples of non-contact force.
(a) Magnetic Force:
(i) A magnet can exert a force on another magnet without being to bear with it.
(ii) The force exerted by a magnet is an example of a non-contact force.
Example: Opposite pole of two magnets attract one another and same pole repel one another.
(b) Electrostatic Force:
(i)When a charged body exert a force on another charged or uncharged body is named electrostatic force.
A charged body attracts an uncharged body.
(ii) A charged body attracts a charged body and repels a charged body without coming to bear, thus it's a non-contact force.
(c) Gravitational Force:
(i) Gravitation force is exerted by earth, moon, sun and other planets to others.
(ii) Earth and other planets attract all objects towards them. Since, earth attracts all objects even without coming to bear, thus gravitation may be a non-contact force.
Example: after we release an object from a height, it falls over the bottom thanks to gravitational attraction of earth.
Pressure:
The force performing on per unit area of a surface is named pressure. we will say force per unit area is named pressure.
Pressure = Force / Area
From above formula, we will say that with same applied force, Pressure is indirectly proportional to the realm, thus pressure decreases with increase in area and increases with decrease in area.
Example:
(i) after we cut an apple, we'd like to use the sharp fringe of the knife rather than blunt knife because the sharp fringe of knife has small extent and that we have to exert less force with high to chop the apple.
(ii) after we put a nail into a wooden board, the pointed end of the nail is kept at the front. The pointed end of the nail has very small extent and this allows us to use a greater pressure with the applied force.
Pressure exerted by Liquid and Gas:
(i) Liquid and gas may also exert pressure on inner walls of the container during which they're kept.
(ii) When air is filled, a rubber balloon gets inflated from all sides. This happens thanks to air or gas exerts pressure over inner walls of the balloon.
(iii) Water starts leaking if there's a pore within the bottle. This happens thanks to water exerts pressure over the walls of the bottle.
Atmospheric Pressure:
(i) Our atmosphere is formed of various styles of gases. Since gases exert pressure, thus Pressure exerted by air (present in atmosphere) is named air pressure.
(ii) the burden of air in an exceedingly column of the peak of the atmosphere and area 10 cm × 10 cm is as large as 1000 kg. the explanation we aren't crushed under this weight is that the pressure inside our bodies is additionally adequate to the air pressure and cancels the pressure from outside.
(iii) A pressed rubber sucker on a plane surface doesn't come off thanks to air pressure.
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