Podcast
Questions and Answers
What is a force?
What is a force?
A push or a pull on an object.
Which unit is used to measure force?
Which unit is used to measure force?
Identify one common force acting on you right now.
Identify one common force acting on you right now.
Gravitational Force, Friction, Normal Force, Tension, Buoyancy, Water/Air Resistance, Spring Force, or Applied Force.
What does the symbol 'F' represent?
What does the symbol 'F' represent?
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What is the effect of friction on motion?
What is the effect of friction on motion?
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What is buoyancy?
What is buoyancy?
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What is a Free Body Diagram?
What is a Free Body Diagram?
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What do Newton's First Law of Motion states?
What do Newton's First Law of Motion states?
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According to Newton's Second Law, acceleration is proportional to the force applied.
According to Newton's Second Law, acceleration is proportional to the force applied.
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Isaac Newton published his work 'Philosophiæ Naturalis Principia Mathematica' in 1687.
Isaac Newton published his work 'Philosophiæ Naturalis Principia Mathematica' in 1687.
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Study Notes
What is "Force"?
- A push or pull on an object
- Has magnitude (size) and direction
- Many different forces can act on an object at the same time
- Measured in Newtons (N)
Some Common Forces
-
Gravitational Force (FG) - acts on all objects that have mass
- directed towards the center of the Earth
-
Friction (FF)
- Resistive force that opposes motion or intended motion
- Acts between two surfaces in contact
- Depends on the type of surfaces
-
Normal Force (FN)
- Perpendicular force that acts in response to a contact force
- Typically, a surface pushing up on an object
-
Tension (FT)
- Force from a rope, cable, or similar - can only pull, not push
-
Water/Air Resistance (FDrag)
- Opposes the motion of an object
- Depends on the viscosity of the fluid and the area of the moving object
-
Bouyancy (FB)
- Upward force acting on an object submerged in a fluid
- Equal to the weight of the fluid displaced
-
Spring Force (FSp)
- Acts when a spring is compressed or stretched, opposing the change in length
-
Applied Force (FApplied)
- Any external force that isn't specifically described
- It is ok to ignore air resistance unless it is mentioned or is a significant force
Free Body Diagram
- Tool used to illustrate the forces acting on a object
- Each force is drawn as an arrow coming FROM the object
- The length of the arrow corresponds to the strength of the force
### Newton's Three Laws
- Written by Isaac Newton in his book "Philosophiæ Naturalis Principia Mathematica" (1687)
Newton's First Law of Motion
- "An object either remains at rest or continues to move at a constant velocity, unless acted upon by a force."
- This is also known as the Law of Inertia:
- Balanced Forces - object remains at rest.
- Unbalanced Forces - object accelerates
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Description
This quiz explores the concept of force in physics, including its definition and various types such as gravitational force, friction, and tension. Test your knowledge on how these forces interact with objects and learn how they are measured. Perfect for students looking to solidify their understanding of fundamental physics concepts.
