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what is force?
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Aristotle famously represented a force as anything that causes an object to undergo “unnatural motion”. Sir Isaac Newton was one of the first scientists to study gravity and force. Any kind of force is just a push or a pull. It can be described as a push or pull on an object.Push or pull of an object is considered a force. Push and pull come from the objects interacting with one another. Terms like stretch and squeeze can also be used to denote force.
In Physics, force is defined as:
The push or pull on an object with mass that causes it to change its velocity.
Force is an external agent capable of changing the state of rest or motion of a particular body. It has a magnitude and a direction. The direction towards which the force is applied is known as the direction of the force, and the application of force is the point where force is applied.
The Force can be measured using a spring balance. The SI unit of force is Newton(N).In physics, motion is defined as the change in position with respect to time. In simpler words, motion refers to the movement of a body. Typically, motion can either be described as:
Change in speed
Change in direction
The Force has different effects and here are some of them.
Force can make a body which is at rest to move.
It can stop a moving body or slow it down.
It can accelerate the speed of a moving body.
It can also change the direction of a moving body along with its shape and size.The quantity of force is expressed by the vector product of mass (m) and acceleration (a). The equation or the formula for force can mathematically be expressed in the form of:
F = ma
Where,
m = mass
a = acceleration
It is articulated in Newton (N) or Kgm/s2.
Acceleration a is given by
a = v/t
Where
v = velocity
t = time taken
So Force can be articulated as:
F = mv/t
Inertia formula is termed as p = mv which can also be articulated as Momentum.
Therefore, Force can be articulated as the rate of change of momentum.
F = p/t = dp/dt
Force formulas are beneficial in finding out the force, mass, acceleration, momentum, velocity in any given problem.
Unit of Force
In the centimetre gram second system of unit (CGS unit) force is expressed in dyne.
In the standard international system of unit (SI unit) it is expressed in Newton (N).
Types of Force
Force is a physical cause that can change the state of motion or the dimensions of an object. There are two types of forces based on their applications:
Contact Force
Non-Contact Force