Force Questions: Looking for Answers

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In summary, force is an entity that causes a body to accelerate, we know it is acting when we observe an acceleration of the body, and it can cause changes in mass and velocity.
  • #1
ultimasayan
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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?
 
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  • #2
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.
 
  • #3
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[tex]^{}2[/tex] so...

F=?
 
  • #4
Sdawg1969 said:
ia in m/s so you end up with a kg*m/s, which is called a Newton.
F=?

a is m/s[tex]^{2}[/tex] so you actually end up with [tex]\frac{kg * m}{s^{2}}[/tex] which really is called a Newton, denoted as N.
 
  • #5
ultimasayan said:
--------------------------------------------------------------------------------

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...
 
  • #6
ultimasayan said:
1.what is an force?

A force is what causes a mass to accelerate.

ultimasayan said:
2.how do we know a force is acting?
A force acts when a body is "accelerating" so to say
ultimasayan said:
3.what effect can force have?

A force can cause a mass to accelerate,change velocity(and speed)
 
  • #7
thank you guys this was great help from your comments
 

Related to Force Questions: Looking for Answers

1. What is force?

Force is a physical quantity that describes the interaction between objects or particles. It can cause an object to accelerate, decelerate, or change direction.

2. How is force measured?

Force is measured using a unit called a Newton (N). One Newton is equal to the amount of force needed to accelerate a 1 kilogram object at a rate of 1 meter per second squared.

3. What are the different types of forces?

There are four main types of forces: gravitational, electromagnetic, strong nuclear, and weak nuclear. Some other types include friction, tension, and normal force.

4. How does force affect motion?

According to Newton's first law of motion, an object at rest will remain at rest and an object in motion will continue moving at a constant velocity unless acted upon by an unbalanced force. This means that force can either cause an object to start moving, stop moving, or change its direction.

5. How does mass and acceleration relate to force?

According to Newton's second law of motion, force is equal to an object's mass multiplied by its acceleration. This means that the greater the mass of an object, the more force is needed to accelerate it, and the greater the acceleration, the more force is required to change its velocity.

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