Force Questions: Looking for Answers

[ultimasayan]

--------------------------------------------------------------------------------

can someone help me please with these questions?
i have read all the Newton law but still not understanding these question properly

1.what is an force?
2.how do we know a force is acting?
3.what effect can force have?

 

[qspeechc]

1) A force is that entity that tends to cause a body of mass to accelerate.
2) This is tricky. I think they mean "how do we know when a net force is acting", and the answer would be:"we observe an acceleration of the body to which the force is applied"
3) Acceleration; deforming a body.

 

[Sdawg1969]

in definition F=ma from Newtons law- m in kg and a in m/s so you end up with a kg*m/s, which is called a Newton. An example...

You have a 300g ball on a string, what is the force of gravity on the ball?

F=ma

acceleration due to gravity is 9.8m/s$$^{}2$$ so...

F=?

 

[kbaumen]

ia in m/s so you end up with a kg*m/s, which is called a Newton.
F=?

a is m/s$$^{2}$$ so you actually end up with $$\frac{kg * m}{s^{2}}$$ which really is called a Newton, denoted as N.

 

[Littlepig]

--------------------------------------------------------------------------------

can someone help me please with these questions?
i have read all the Newton law but still not understanding these question properly

1.what is an force?
Above all, it's a Human Concept;
them, it's a concept that was made to explain a phenomena;

than yes, Is the variation of velocity and or mass with time, that is dp/dt.
you can see force as variation of energy(not energy but momentum) that a body as.


2.how do we know a force is acting?

By the definition, dp/dt, measuring mass and velocity, if 1 of witch is changing with time, them a force is acting on that object.(classical mechanics...)

3.what effect can force have?

Well, can change mass and can change velocity...i guess that's it...

 

[rock.freak667]

1.what is an force?

A force is what causes a mass to accelerate.

2.how do we know a force is acting?

A force acts when a body is "accelerating" so to say

3.what effect can force have?

A force can cause a mass to accelerate,change velocity(and speed)

 

[ultimasayan]

thank you guys this was great help from your comments