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Questions and Answers
What is an applied force in physics?
What is an applied force in physics?
- A type of frictional force that opposes motion
- A kind of pushing or pulling effect that is felt by an object (correct)
- The force exerted by an object on itself
- A push or pull effect felt by an object due to gravity
What is a characteristic of an applied force?
What is a characteristic of an applied force?
- It is always attractive in nature
- It can only change the shape of an object
- It is a scalar quantity
- It has a magnitude and direction, making it a vector quantity (correct)
What is an example of an applied force?
What is an example of an applied force?
- A car moving at a constant velocity
- A magnet attracting a paper clip
- A ball rolling on the ground
- A man pushing a door open (correct)
What can an applied force change in an object?
What can an applied force change in an object?
What is necessary for an applied force to exist?
What is necessary for an applied force to exist?
What is the force that arises when two surfaces rub over each other?
What is the force that arises when two surfaces rub over each other?
What is the force that pulls objects towards the earth?
What is the force that pulls objects towards the earth?
What type of force acts on a string or rope when it is stretched by an object?
What type of force acts on a string or rope when it is stretched by an object?
What is the force that acts between two or more stationary electric charges?
What is the force that acts between two or more stationary electric charges?
What is the force that causes the moon to revolve around the earth?
What is the force that causes the moon to revolve around the earth?
What is the effect of an applied force on an object?
What is the effect of an applied force on an object?
What type of force is exerted when a baseball player hits the ball?
What type of force is exerted when a baseball player hits the ball?
What is the fundamental difference between contact and non-contact forces?
What is the fundamental difference between contact and non-contact forces?
What is a common property of all applied forces?
What is a common property of all applied forces?
What happens when two equal forces act on an object in opposite directions?
What happens when two equal forces act on an object in opposite directions?
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.
