What is force? How can we interpret the full definition of force?

[wondu12345ABCD]

Homework Statement

Definition of force: force is push or pull.The force is when applying to object the object start to move in direction of force . Force is vector quantity due to fact that it needs both magnitude and direction. The unit of force is newton.By second newton law force is define or express like this ; Force is the product of mass times acceleration.one newton equals one kilogram meter second.The dimension of force is ML/T2.

Relevant Equations

Q1: How much force needed to move 3kg object accelerate 2m/s2.

Solution: Given mass=3kg & a=2m/s^2.
F=m*a=3kg*2m/s^2=6kg.m/s^2=6N.

 

[Pisica]

Force is the measure of interaction between 2 or more bodies.
Newton's third law of action-reaction

Example
If an astronaut in space accidentally detaches from the ship and moves away from the ship,
How does he manage to get back to the ship?

He throws his tools in the opposite direction.

 

[haruspex]

Force is the measure of interaction between 2 or more bodies.
Newton's third law of action-reaction

Example
If an astronaut in space accidentally detaches from the ship and moves away from the ship,
How does he manage to get back to the ship?

He throws his tools in the opposite direction.

Your example is more to do with momentum than with force.

@wondu12345ABCD, what are you asking of the forum? Are you just looking for confirmation of your answer?

 

[Pisica]

On the wiki it is defined as:
"A force is an influence that can cause an object to change its velocity"
https://en.wikipedia.org/wiki/Force

 

[Pisica]

Your example is more to do with momentum than with force.

 

[Lnewqban]

View attachment 359416

That is correct, but not excluding.
But, ...force without movement can exist.
Example, internal structural stress of a bridge resisting bending loads.

 

[Lindsaatar]

Not that scientifically, I would explain it as a physical action—so it may not have a 'significant' effect, but it is produced and exists.
However, scientifically, it is hard to define it without any reference to other related concepts, as they are all interconnected. Just think of dimensional analysis.