Question

what is force ? explain it as much you can because I need a no copied answer and breif explaination

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Answer 1

What is Force?

Force is defined as an external cause that changes or tends to change the state of the body once applied, if the body is in motion it comes to rest and if at rest then will come to motion. It can also cause a change in the direction, shape, size, etc of the body. Example: Pushing or pulling a door by applying force.

Force is a vector quantity which means it has both magnitudes as well as direction. According to Newton's second law, force is stated as the “product of mass and acceleration of a body”.

What are the Effects of Force?

Force acting on the body may affect the shape of the body or will accelerate or decelerate the body, or it will give motion to the static body or it will stop the motion of the dynamic body.

Effect of Force Can Be Understood By the Following Points -

The force increases the speed of a moving object or it may also move the stationary object.

Force can stop the moving object or it can just decrease the speed of the moving object.

The effect of force changes the direction of the object.

Force changes the shape and size of the object.

Types of Forces:

There are two types of forces:

1. Contact forces

2. Non- contact forces

Contact Force:

Contact force is a force which is applied by actually touching the body.

Examples:

a. Tension Force

b. Spring Force

c. Normal Force

d. Air resistance Force

e. Frictional Force

f. Force of Gravity

g. Applied Force

Tension Force: Tension force is that force which is applied on the cable, rope, or string at the ends. It is directed towards the length of the wire and pulls the energy equally from both ends. Mathematically it is shown as:

T = mg + ma

Where T = tension in Newton (N), m = mass in (kg),

g = gravitational force (9.8m/s²)

Spring Force: Spring force is also known as restoring force. If any force acts on the body which will either compress or stretch the body then this force acts to restore the equilibrium position. For example in the case of rubber. Mathematically it is written as:

F = kx

Where, F = spring force, k = spring constant,

x = distance stretched or compressed

Normal Force: The normal force is again a contact force. This force only exists if two surfaces are in contact otherwise it will not act, from the figure, it can be clearly understood. An example is a book lying on the desk, etc.

Air Resistance Force: If an object is moving through the air then this force will occur and it will resist the body from moving.

In other words, air behaves as friction and it will act in the opposite direction of the body.

Frictional Force: Frictional force is the opposing force. This force is generated when the two surfaces are in contact or slide opposite to each other. The surface of the body plays a major role in this type of friction. More rough the surface more will be the friction.

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Answer 2

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Force -

Any action which causes push or pull on a body is called force, forces are used in actions like pushing, pulling, lifting, twisting, pressing an object etc.

$\pink\dashrightarrow$It is a vector quantity

Why Force is a vector quantity?

$\pink\dashrightarrow$Force is a vector quantity because it have magnitude and direction both.

$\pink\dashrightarrow$SI unit of force is newton Or kg / m^-s.

Effects of forces -

A force cannot be seen, it can only be judge by its effects on an object.