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What is a force?
A force is a push or a pull.
Forces come in pairs: action and reaction.
True
What is the unit of measurement for force?
Newtons (N)
Which of the following are types of forces affecting movement? (Select all that apply)
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What is the only non-contact force in sport/exercise?
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Match the following types of contact forces:
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Study Notes
Definition of Force
- A force is defined as a push or a pull acting on an object.
Classification of Force
- Forces are categorized into two types: external and internal.
- Forces always occur in pairs: an action force and a reaction force.
- Forces are responsible for causing changes in movement.
Measuring Force
- Force (F) is quantified in Newtons (N).
Forces Affecting Movement
- Key forces impacting movement include:
- Gravity
- Friction
- Drag
- External forces act on the body from the environment, while internal forces originate from within the body.
Types of Forces
-
Non-Contact Force:
- The only significant non-contact force in sports or exercise is gravity (also referred to as weight force, FWT).
-
Contact Forces:
- Include interactions between objects touching each other.
- Types of contact forces:
- Normal Contact Force
- Fluid Contact Force
- Friction
Breakdown of Contact Forces
- Normal Contact Force: Acts perpendicular to surfaces in contact.
- Fluid Contact Force: Acts through fluids on objects interacting with them, such as swimming.
- Friction: A force resisting the relative motion of solid surfaces.
Internal Forces
- Internal forces can be classified into:
- Tensile Force: Pulling force.
- Compressive Force: Pushing force.
- Shear Force: Acts parallel to the material.
Gravity
- Also known as weight force, gravity is a fundamental force acting through an object's center of gravity (COG).
Other Key Points
- Ground Reaction Force also plays a significant role, acting parallel to the normal contact in various physical activities.
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Description
Explore the fundamental concepts of force in this quiz. Understand the distinction between internal and external forces, learn how they are measured, and discover the key forces affecting movement. Test your knowledge on non-contact and contact forces that play a vital role in various physical activities.
