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Questions and Answers
What is an applied force in physics?
What is a characteristic of an applied force?
What is an example of an applied force?
What can an applied force change in an object?
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What is necessary for an applied force to exist?
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What is the force that arises when two surfaces rub over each other?
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What is the force that pulls objects towards the earth?
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What type of force acts on a string or rope when it is stretched by an object?
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What is the force that acts between two or more stationary electric charges?
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What is the force that causes the moon to revolve around the earth?
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What is the effect of an applied force on an object?
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What type of force is exerted when a baseball player hits the ball?
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What is the fundamental difference between contact and non-contact forces?
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What is a common property of all applied forces?
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What happens when two equal forces act on an object in opposite directions?
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Study Notes
What is Applied Force?
- Applied force is a push or pull effect exerted by one object on another.
- It is a result of the interaction between a minimum of two objects.
- Applied force has a magnitude and direction, making it a vector quantity.
Characteristics of Applied Force
- Can change the state of rest or motion of an object.
- Can change the direction of an object.
- Can change the shape or size of an object.
Examples of Applied Force
- Catching a ball: applying force to change the state of motion of the ball from motion to rest.
- Hitting a baseball: applying force to change the direction of motion of the ball.
- Creating pottery: applying force to change the shape of the clay.
- Magnet attracting coins: applying a non-contact force to attract metal coins.
Types of Applied Forces
Contact Forces
- Forces that occur when objects are in physical contact with each other.
- Examples: catching a ball, hitting a baseball, creating pottery.
Non-Contact Forces
- Forces that occur between objects that are not in physical contact with each other.
- Examples: magnet attracting coins, gravitational force, electrostatic force, magnetic force.
Properties of Applied Forces
- They are vectors, specified with magnitude and direction.
- They are additive in nature, with resultant force given by the vector sum of individual forces.
- They can be zero when two equal forces act on an object in opposite directions.
Contact vs Non-Contact Forces
- Contact forces occur when objects are in physical contact with each other.
- Non-contact forces occur between objects that are separated by some distance.
Uses of Applied Force
- Earth and Solar System: gravitational force between planets and the sun.
- Life on Earth: gravitational force between the earth and objects on or near it.
- Pushing a parcel: both contact and non-contact forces act on it.
- Magnetic refrigerator doors: non-contact magnetic force between the magnetic strip and the refrigerator body.
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Description
Learn about the concept of applied force, its definition, and examples in everyday life. Understand how objects interact with each other and the forces that come into play.
