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Questions and Answers
What is the unit of measurement for force?
Which type of force is responsible for opposing motion between two surfaces in contact?
Which characteristic of force is demonstrated by its ability to be either attractive or repulsive?
What is the name of the force exerted by a surface on an object?
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What is the name of the force that opposes motion through air?
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Study Notes
Force
Definition
- A push or pull that causes an object to change its motion or shape
- Measured in Newtons (N)
Characteristics
- Vector quantity: has both magnitude (amount of force) and direction
- Can be contact force (e.g., friction, normal force) or non-contact force (e.g., gravity, electromagnetic)
Types of Forces
- Gravity (weight force): attractive force between two objects with mass
- Normal force (support force): force exerted by a surface on an object
- Tension force: force exerted by a stretched string or wire
- Air resistance (drag force): force opposing motion through air
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Friction force: force opposing motion between two surfaces in contact
- Static friction: prevents motion from starting
- Kinetic friction: opposes motion already occurring
- Electromagnetic force: force between charged particles or magnets
Force Definition
- Force is a push or pull that causes an object to change its motion or shape.
Force Characteristics
- Force is a vector quantity, having both magnitude (amount of force) and direction.
- Forces can be classified as contact forces or non-contact forces.
Types of Forces
- Gravity: an attractive force between two objects with mass, also known as weight force.
- Normal Force: a force exerted by a surface on an object, also known as support force.
- Tension Force: a force exerted by a stretched string or wire.
- Air Resistance: a force opposing motion through air, also known as drag force.
Friction Force
- A force opposing motion between two surfaces in contact.
- Static Friction: prevents motion from starting.
- Kinetic Friction: opposes motion already occurring.
Electromagnetic Force
- A force between charged particles or magnets.
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Description
Understand the concept of force, its characteristics, and types. Learn about contact and non-contact forces, gravity, and normal force.
