Questions and Answers
What is the definition of force?
What is the SI unit of force?
Newton (N)
What does N equal?
(kg * m)/s^2
What does F equal when using mass (m) and acceleration (a)?
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1 N equals how many pounds?
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1 slug equals how many pounds?
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What is weight defined as?
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Weight is a type of what?
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What does w equal in the context of weight?
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What is the acceleration due to gravity on Earth's surface?
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What are contact forces?
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What are field forces?
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What type of quantity is force?
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What are force diagrams also known as?
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What is the definition of applied force?
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What is gravity force?
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What is the normal force?
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What is frictional force?
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What is air resistance force?
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What is inertia?
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What is mass in relation to inertia?
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What does Newton's First Law state?
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What is mass defined as?
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What is static equilibrium?
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What is dynamic equilibrium?
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What is net force?
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An object's acceleration is __________ to net forces acting on it.
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What happens when surfaces slide over one another?
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What does the Force of Friction depend on?
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What kind of friction occurs as an object pushes through a fluid?
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What does acceleration depend on?
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An object's acceleration is _______ to its mass.
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What does Newton's Second Law of Motion state?
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What is the formula for acceleration?
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What does Newton's Third Law state?
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What is terminal velocity?
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Study Notes
Newton's Laws of Motion Overview
- Force is defined as a push or pull acting on an object.
- The SI unit of force is the Newton (N).
- One Newton can be calculated as (kg * m)/s².
- The formula to calculate force is represented as F = ma, where 'm' is mass and 'a' is acceleration.
Weight and Units
- Weight quantifies the gravitational pull on an object, measured in Newtons (N).
- 1 N is equivalent to approximately 0.225 lbs, establishing a conversion between metric and imperial units.
- The slug, a unit of mass, is equivalent to 32 lbs.
Types of Forces
- Weight itself is classified as a force.
- Weight can be expressed mathematically as w = mg, with 'g' representing gravitational acceleration.
- Gravitational acceleration at Earth's surface is approximately 9.8 m/s².
Force Interactions
- Contact forces arise from direct physical interaction between objects.
- Field forces can act over a distance without contact (e.g., gravitational force).
- Force is categorized as a vector quantity, which has both magnitude and direction.
Diagrams and Visualization
- Force diagrams, or free-body diagrams, visually represent forces acting on an object with arrows indicating direction and magnitude.
Types of Specific Forces
- Applied force refers to the push or pull exerted by an object or person.
- Gravity force is the attraction exerted by massive bodies like Earth.
- The normal force acts perpendicular to the surface supporting an object.
- Frictional force opposes motion as an object slides over a surface.
- Air resistance is a friction-like force encountered when moving through the air.
Laws of Motion
- Newton's First Law asserts that an object will maintain its state of rest or uniform motion unless acted upon by an external force.
- Mass measures an object's inertia, which is its resistance to change in motion.
- Static equilibrium refers to objects at rest, while dynamic equilibrium involves moving objects at constant speed in a straight line.
Force and Acceleration Relationships
- The net force is the sum of all the forces acting on an object.
- Acceleration is directly proportional to the net force acting on an object and inversely proportional to its mass.
- Newton's Second Law is expressed as acceleration (a) = net force (F) / mass (m).
- Newton's Third Law states that for every action, there is an equal and opposite reaction.
Friction Considerations
- The force of friction is influenced by the applied force, frictional force, and the object's inertia.
- Fluid friction occurs when objects move through a fluid, causing resistance.
- Factors that do not affect friction include the speed of the object and the surface characteristics.
Terminal Velocity
- Terminal velocity is reached when the upward force of air resistance equals the downward force of weight, resulting in no further acceleration.
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Test your knowledge with these flashcards on Newton's Laws of Motion. This quiz covers key terms and definitions that are crucial for understanding the fundamental concepts of force and motion. Perfect for students looking to reinforce their learning in physics.