Questions and Answers
What is a contact force?
What is a non-contact force?
All forces have both _________________________ and ___________________________.
magnitude, direction
What is impact force?
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What is frictional force?
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What is buoyant force?
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What is centripetal force?
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What is inertia?
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What does air resistance oppose?
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What are balanced forces?
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What are unbalanced forces?
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What is gravitational force?
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What is electrostatic force?
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What is elastic force?
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What is tension force?
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What causes the orbits of planets and satellites?
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What is magnetic force?
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What does the equation F=m x a represent?
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Examples of contact forces include ______________________, ______________________, _________________, ___________________, ____________________, _________________ and _________________ .
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Examples of non-contact forces include ______________________, ______________________, __________________, ___________________ .
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Study Notes
Contact and Non-Contact Forces
- Contact Force: Force that occurs between two objects physically touching each other.
- Non-Contact Force: Force that acts at a distance without physical contact between objects.
Characteristics of Forces
- Magnitude and Direction: Every force possesses both strength (magnitude) and orientation (direction).
- Impact Force: Result of a direct collision between two objects, exerting force upon contact.
Types of Contact Forces
- Frictional Force: Resistance encountered when two surfaces rub against each other; can be classified into rolling, sliding, fluid, or static friction.
- Buoyant Force: Upward force exerted by a fluid, counteracting gravitational force on submerged or floating objects.
- Tension Force: The pulling force transmitted through a string, rope, or cable.
- Elastic Force: The ability of an object to return to its original shape after being stretched or compressed.
- Air Resistance: Force opposing the motion of an object through air; e.g., it slows down a falling feather.
- Impact Force: Direct force experienced during a collision.
Types of Non-Contact Forces
- Gravitational Force: Attraction between two masses, influenced by their mass and the distance separating them.
- Electrostatic Force: Attraction or repulsion between charged objects; like charges repel while opposite charges attract.
- Magnetic Force: Force of attraction or repulsion between magnetic poles.
- Centripetal Force: An inward force that keeps an object moving in a circular path.
Dynamics of Forces
- Balanced Forces: Forces that are equal in size and opposite in direction, resulting in no change in an object's motion (net force of zero).
- Unbalanced Forces: Forces that are not equal, producing a net force that causes acceleration, changing an object's velocity (e.g., speeding up, slowing down, or changing direction).
Key Concepts in Motion
- Inertia: The natural tendency of an object to resist changes in its velocity, maintaining its state of motion.
- Orbits of Planets and Satellites: Resulting from the interplay of inertia and gravitational force which keeps celestial bodies in motion around each other.
Newton's Laws
- Newton's Second Law (F = m x a): Describes how the force acting on an object is equal to the mass of the object multiplied by its acceleration; suggests that more mass requires greater force to achieve the same acceleration.
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This quiz consists of flashcards that cover the concepts of contact and non-contact forces. Each card defines key terms and principles relevant to forces acting between objects. Sharpen your understanding of physics with this interactive study tool.
