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# Physics: Forces and Motion

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@RazorSharpLute

### What is the definition of a force?

A push or pull that causes an object to change its motion or shape

### Which of the following is an example of a non-contact force?

Gravitational force

Newtons

### What is the result of combining multiple forces acting on an object?

<p>The resultant force is the single force that results from the combination of multiple forces</p> Signup and view all the answers

### What is Newton's First Law of Motion?

<p>An object at rest will remain at rest, and an object in motion will continue to move with a constant velocity, unless acted upon by an external force</p> Signup and view all the answers

### What is the formula for Newton's Second Law of Motion?

<p>F = ma</p> Signup and view all the answers

## Study Notes

### Definition of Force

• A force is a push or pull that causes an object to change its motion or shape.
• It is a vector quantity, meaning it has both magnitude (amount of force) and direction.

### Types of Forces

• Contact Forces:
• Frictional force: opposing motion between two surfaces in contact
• Normal force: force exerted by a surface on an object that is in contact with it
• Tension force: force exerted by a stretched string or wire
• Air resistance force: force opposing motion through the air
• Non-Contact Forces:
• Gravitational force: force of attraction between two objects with mass
• Electromagnetic force: force between charged particles or magnets
• Nuclear force: force that holds protons and neutrons together in an atom

### Characteristics of Forces

• Magnitude: the amount of force applied, measured in units such as Newtons (N)
• Direction: the direction in which the force is applied, can be described in terms of angles or coordinates
• Point of Application: the point at which the force is applied to an object
• Resultant Force: the single force that results from the combination of multiple forces acting on an object

### Newton's Laws of Motion

• First Law: an object at rest will remain at rest, and an object in motion will continue to move with a constant velocity, unless acted upon by an external force
• Second Law: the force applied to an object is equal to the mass of the object multiplied by its acceleration (F = ma)
• Third Law: for every action, there is an equal and opposite reaction force

### Definition of Force

• Force is a push or pull that causes an object to change its motion or shape.
• It is a vector quantity, meaning it has both magnitude (amount of force) and direction.

### Types of Forces

• Contact Forces:
• Frictional force opposes motion between two surfaces in contact.
• Normal force is exerted by a surface on an object in contact with it.
• Tension force is exerted by a stretched string or wire.
• Air resistance force opposes motion through the air.
• Non-Contact Forces:
• Gravitational force is the force of attraction between two objects with mass.
• Electromagnetic force is the force between charged particles or magnets.
• Nuclear force holds protons and neutrons together in an atom.

### Characteristics of Forces

• Magnitude is the amount of force applied, measured in units such as Newtons (N).
• Direction is the direction in which the force is applied, described in terms of angles or coordinates.
• Point of Application is the point at which the force is applied to an object.
• Resultant Force is the single force resulting from the combination of multiple forces acting on an object.

### Newton's Laws of Motion

• First Law: an object at rest remains at rest, and an object in motion continues to move with a constant velocity, unless acted upon by an external force.
• Second Law: force applied to an object equals the mass of the object multiplied by its acceleration (F = ma).
• Third Law: for every action, there is an equal and opposite reaction force.

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## Description

Explore the concept of force, its definition, types, and properties. Learn about contact forces, frictional force, normal force, and more.

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