# How do we know a force is acting?

• ultimasayan
In summary, the conversation is about the concept of force in physics. The definition of force is the cause of acceleration in a mass, and it can be experienced as a lift, push, or pull. The speaker is asking for help understanding the concept further and mentions a deadline for their learning. The other person suggests looking for Newton's Second Law in a text as it may answer all three questions. The conversation ends with the speaker apologizing for wasting the other person's time.
ultimasayan
can someone help me please with these questions

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

i really need help by 06/02/08 gmt 10 am

thx

"In physics, force is what causes a mass to accelerate. It may be experienced as a lift, a push, or a pull" - wikipedia

No offense, but these are pretty basic definitions that you could find easily with a little effort. Do you have a text? What does it say about forces?

I'll give you a hint: If you can find Newton's Second Law in your text, it should answer all three of these for you.

Casey

thx lol

## 1. How do we measure a force?

A force is measured using a device called a force meter or a spring scale. This device uses the principle of Hooke's law, which states that the force applied to an object is directly proportional to its displacement. The force meter measures the displacement of the spring and converts it into a force measurement.

## 2. What are the different types of forces?

There are four fundamental forces in nature: gravity, electromagnetism, strong nuclear force, and weak nuclear force. In everyday life, we encounter forces such as friction, tension, compression, and normal force. These forces can be categorized as contact forces or non-contact forces.

## 3. How do we know when multiple forces are acting on an object?

When multiple forces act on an object, the net force is the vector sum of all the individual forces. This means that we can determine the direction and magnitude of the net force by adding all the forces together. If the net force is non-zero, then we know that multiple forces are acting on the object.

## 4. How do we know if a force is balanced or unbalanced?

A balanced force is when the net force on an object is equal to zero. This means that the individual forces acting on the object cancel each other out, resulting in no acceleration. An unbalanced force is when the net force is non-zero, resulting in acceleration of the object in the direction of the net force.

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

According to Newton's second law of motion, the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. This means that as the force increases, the acceleration will also increase, but as the mass increases, the acceleration will decrease.

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