All the definition for th science force and laws of motion
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ans.According to Newton's First Law of Motion, “an object remains in a state of rest or of uniform motion in a straight line unless compelled to change that state by an applied force.” The tendency of uninterrupted objects to stay at rest or to keep moving (if inmotion) with the same velocity is known as inertia.
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Definition of Force
Force is something that enables us to do any work. It is the push or a pull acting on a body, which cannot be seen but can only be felt. It is a vector quantity because it can be described by both magnitude and direction and the SI unit of Force is Newton represented by the symbol F.
Examples of Force
Push or pull to open a door
Lifting a box
Pulling a trolley
Force can be judged by the various effects it can produce in several bodies.
The Effects of Force and be enumerated as follows
Force can put a stationary body to motion- This means that when an adequate amount of force is applied to a non-moving body then the latter moves. For example- a box lying on the floor can be moved by pushing it i.e by applying force on it
Force can put a body in motion to rest – This means it can stop a moving body. For example- a car in motion can be stopped by applying brakes to it
The speed of a moving body can be changed by applying force on it – by putting force on the accelerator the speed of a moving car can be increased and by applying brakes the speed can either be decreased and eventually even stop the moving car
Force can change the direction of a moving body- For example, id adequate amount of force is applied on the moving football to the desired direction then the ball will move in the direction it has been kicked
Force can change the shape and size of an object – For example by hammering a solid block of rock, a statue can be made.
Types of Force
Force can be further categorized into two types-
Balanced Forces
Balanced forces are the one where not all the above-mentioned effects of force holds true, which means that the result of applied forces is equal to zero. Balanced forces do not cause any change in the state of the object it is applied upon i.e. the object in which force is applied the state doesn’t change from motion to rest or vice-versa, however, balanced forces can change the shape and size of an object. Such kind of forces is equal in magnitude but in opposite directions. For example- Two people putting equal force in a tug-off war or a log floating on water.
Unbalanced Forces
Unlike balanced forces, unbalanced forces are ones where the resultant applied forces is greater than zero i.e. the forces acting on the object is not same.
The features of Unbalanced forces are-
It can move a stationary body
Increase or decrease the speed of a moving body
Put a moving to rest
Change the shape and size of the object on which force is applied upon
Other Types of Forces are
Muscular Force
Gravitational Force
Frictional Force
Air Resistance
Laws of Motion
What is Motion?
Motion is described as a change in the position of an object over time. It is described in terms of displacement, distance, velocity, acceleration, time, and speed.
Force is something that enables us to do any work. It is the push or a pull acting on a body, which cannot be seen but can only be felt. It is a vector quantity because it can be described by both magnitude and direction and the SI unit of Force is Newton represented by the symbol F.
Examples of Force
Push or pull to open a door
Lifting a box
Pulling a trolley
Force can be judged by the various effects it can produce in several bodies.
The Effects of Force and be enumerated as follows
Force can put a stationary body to motion- This means that when an adequate amount of force is applied to a non-moving body then the latter moves. For example- a box lying on the floor can be moved by pushing it i.e by applying force on it
Force can put a body in motion to rest – This means it can stop a moving body. For example- a car in motion can be stopped by applying brakes to it
The speed of a moving body can be changed by applying force on it – by putting force on the accelerator the speed of a moving car can be increased and by applying brakes the speed can either be decreased and eventually even stop the moving car
Force can change the direction of a moving body- For example, id adequate amount of force is applied on the moving football to the desired direction then the ball will move in the direction it has been kicked
Force can change the shape and size of an object – For example by hammering a solid block of rock, a statue can be made.
Types of Force
Force can be further categorized into two types-
Balanced Forces
Balanced forces are the one where not all the above-mentioned effects of force holds true, which means that the result of applied forces is equal to zero. Balanced forces do not cause any change in the state of the object it is applied upon i.e. the object in which force is applied the state doesn’t change from motion to rest or vice-versa, however, balanced forces can change the shape and size of an object. Such kind of forces is equal in magnitude but in opposite directions. For example- Two people putting equal force in a tug-off war or a log floating on water.
Unbalanced Forces
Unlike balanced forces, unbalanced forces are ones where the resultant applied forces is greater than zero i.e. the forces acting on the object is not same.
The features of Unbalanced forces are-
It can move a stationary body
Increase or decrease the speed of a moving body
Put a moving to rest
Change the shape and size of the object on which force is applied upon
Other Types of Forces are
Muscular Force
Gravitational Force
Frictional Force
Air Resistance
Laws of Motion
What is Motion?
Motion is described as a change in the position of an object over time. It is described in terms of displacement, distance, velocity, acceleration, time, and speed.
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