Question

what is force?what is its unit​

Answer 1

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✍️$<i><b>$ Force is push or pull on an object which changes the shape, size, state of motion or rest.

It's unit is Newton which is represented by 'N'.

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Answer 2

Force is push or pull.

OR

Force is also described as product of mass and acceleration due to gravity.

i.e.

$\textbf{Formula :}$

F = m × a

$\textbf{Symbol :}$

It is denotes as F (Force)

$\textbf{Changes occurs due to force are :}$

→ Because of force shape of the body or object.

→ Force changes the shape of the body or object.

→ It changes the position of the body or object.

→ It changes the direction of the body or object.

$\textbf{S.I. Unit :}$

As we know that F = ma

S.I. unit of mass (m) = kg

S.I. unit of acceleration (a) = ms-²

So,

S.I. unit of F (force) = kg ms-² or N

$\textbf{Dimensions :}$

Dimension of Mass (m) = [M¹]

Dimension of Acceleration due to gravity (a) = [L¹T-²]

So,

Dimension of Force (f) = [M¹] [L¹T-²]

= [M¹L¹T-²]

$\textbf{Quantity :}$

It is a vector quantity as it has both magnitude as well as direction.

$\textbf{Types :}$

It is of two types...

1) Contact force.

2) Non - Contact force.

• Contact force - friction, tension, spring, touch etc.

• Non - Contact force - gravity, electrical force, magnetism etc.

$\textbf{Example :}$

When we press a balloon or spong it changes its shape because of force..