Podcast
Questions and Answers
What distinguishes contact forces from non-contact forces?
What distinguishes contact forces from non-contact forces?
- Contact forces are always stronger than non-contact forces.
- Non-contact forces only apply at a distance and have no physical origin.
- Contact forces require physical interaction, while non-contact forces do not. (correct)
- Contact forces occur exclusively in solid objects, whereas non-contact forces are limited to fluids.
Which of the following is an example of a non-contact force?
Which of the following is an example of a non-contact force?
- Buoyant force in a fluid
- Magnetic attraction between two magnets (correct)
- Tension in a rope
- Friction between two sliding surfaces
Which statement is true about contact and non-contact forces?
Which statement is true about contact and non-contact forces?
- Non-contact forces can become contact forces under certain conditions. (correct)
- Non-contact forces can only act through physical mediums.
- All forces can be classified as either contact or non-contact without overlap.
- Contact forces can only be observed in static situations.
Which of the following correctly categorizes the types of forces?
Which of the following correctly categorizes the types of forces?
What is the primary characteristic that defines contact forces?
What is the primary characteristic that defines contact forces?
Which of the following best defines force?
Which of the following best defines force?
What is the SI unit of force?
What is the SI unit of force?
Which statement about the effects of force is correct?
Which statement about the effects of force is correct?
In which equation is force expressed as the product of mass and acceleration?
In which equation is force expressed as the product of mass and acceleration?
What type of motion does force NOT directly affect?
What type of motion does force NOT directly affect?
Which of the following terms can also denote force?
Which of the following terms can also denote force?
How is acceleration expressed in relation to force?
How is acceleration expressed in relation to force?
Flashcards
Force
Force
A push or pull on an object that can change its state of motion or size.
Effects of Force
Effects of Force
Force can make a stationary object move, stop a moving object, accelerate an object, or change its direction and shape.
Force Formula
Force Formula
Force (F) equals mass (m) times acceleration (a), F = ma
Unit of Force (SI)
Unit of Force (SI)
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Force and Motion
Force and Motion
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Acceleration
Acceleration
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Momentum
Momentum
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Force and Momentum Relationship
Force and Momentum Relationship
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Contact Force
Contact Force
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Non-Contact Force
Non-Contact Force
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Force Types
Force Types
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Contact Force Example
Contact Force Example
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Non-Contact Force Example
Non-Contact Force Example
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Study Notes
Force Definition and Characteristics
- Force is anything causing unnatural motion (Aristotle).
- Force is a push or pull on an object. Stretch and squeeze are also descriptions of force.
- Force is an external agent changing rest or motion. It has magnitude and direction.
- Force direction is the direction applied.
- Force is measured using a spring balance.
- SI unit of force is the Newton (N).
Effects of Force
- Force causes changes in motion (position over time).
- Force can cause:
- Movement of a resting object.
- Stopping or slowing a moving object.
- Acceleration of a moving object.
- Changes in direction, shape, and size of a moving object.
Force Formula and Calculation
- Force (F) equals mass (m) times acceleration (a). (F = ma)
- Acceleration (a) is calculated as change in velocity (v) divided by time (t). (a = v/t)
- Force can also be expressed as the rate of change of momentum.
- Momentum (p) = mass (m) x velocity (v).
- Units:
- Newton (N) or kg⋅m/s² (SI)
- Dyne (CGS)
Force Types
- Force types are classified as:
- Contact force
- Non-contact force
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