I can't quite understand the concept of force.Force = Mass *

In summary, the concept of force is represented by the equation ƩF = ma, meaning that the net force on an object is equal to its mass times its acceleration. Work is equal to force times distance. If an object does not move, it does not mean that no force was exerted, but rather that the net force on the object is zero. In order to start an object moving, a net force must be applied to overcome its inertia and accelerate it.
  • #1
Atomic_Sheep
18
1
I can't quite understand the concept of force.

Force = Mass * Acceleration

Work = Force * Distance

If you apply a force to an object, and it doesn't move, no work has been done. Yet if an object doesn't move, how can there be acceleration? So based on that, no force has been exerted?

And also, if you try to move an object for example a stapler across your desk, you need to apply a constant force to it to keep it moving at a constant velocity, so that force is equal to the force exerted by the friction. So if you apply a force equal to the opposing force, the net forces cancel out and you get no acceleration. So does that mean that to get the stapler to move in the first place, more force than what the friction value is, was necessary to get the stapler to begin moving (in order to change the inertia/invoke a new vector of force on the mass of the stapler?).
 
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  • #2


Atomic_Sheep said:
I can't quite understand the concept of force.

Force = Mass * Acceleration
Better to think of this as ƩF = ma: net force on an object equals mass * acceleration.

Work = Force * Distance

If you apply a force to an object, and it doesn't move, no work has been done. Yet if an object doesn't move, how can there be acceleration? So based on that, no force has been exerted?
It just means that the net force on the object is zero, not that you exerted no force.

And also, if you try to move an object for example a stapler across your desk, you need to apply a constant force to it to keep it moving at a constant velocity, so that force is equal to the force exerted by the friction. So if you apply a force equal to the opposing force, the net forces cancel out and you get no acceleration. So does that mean that to get the stapler to move in the first place, more force than what the friction value is, was necessary to get the stapler to begin moving (in order to change the inertia/invoke a new vector of force on the mass of the stapler?).
Right! In order to start something moving you must accelerate it, which requires a net force.
 
  • #3


That makes more sense now, thanks!
 

1. What is the concept of force?

The concept of force is a fundamental concept in physics that describes the influence of an object on the motion of another object. It is a vector quantity, meaning that it has both magnitude and direction.

2. How is force measured?

Force is measured in units of Newtons (N) in the International System of Units (SI). One Newton is equal to the force required to accelerate a mass of one kilogram at a rate of one meter per second squared.

3. What is the relationship between force, mass, and acceleration?

According to Newton's second law of motion, the force acting on an object is equal to its mass multiplied by its acceleration. This can be represented by the equation F = ma, where F is force, m is mass, and a is acceleration.

4. What is the difference between mass and weight?

Mass is a measure of the amount of matter an object contains, while weight is a measure of the force exerted on an object by gravity. Mass is constant, but weight can vary depending on the gravitational pull of a particular location.

5. How does force affect an object's motion?

Force can cause an object to change its speed, direction, or both. If an object is at rest, a force can make it start moving. If an object is already in motion, a force can make it speed up, slow down, or change direction.

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