Podcast
Questions and Answers
What is the definition of force?
What is the definition of force?
Gravity is an example of a contact force.
Gravity is an example of a contact force.
False
What is the energy an object possesses due to its motion?
What is the energy an object possesses due to its motion?
Kinetic Energy
A stretched rubber band is an example of ______________________ energy.
A stretched rubber band is an example of ______________________ energy.
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What type of force is friction?
What type of force is friction?
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Match the following types of energy with their definitions:
Match the following types of energy with their definitions:
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A moving car on a road is an example of potential energy.
A moving car on a road is an example of potential energy.
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A ball held high above the ground is an example of ______________________ energy.
A ball held high above the ground is an example of ______________________ energy.
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What type of force is air resistance?
What type of force is air resistance?
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What is the difference between kinetic energy and potential energy?
What is the difference between kinetic energy and potential energy?
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Study Notes
Forces
- A force is an action that changes or maintains the motion of a body or object, and can be defined as a push or a pull.
- Forces can change an object's speed, direction, and shape.
Types of Forces
- Push and Pull Forces:
- Push: Kicking a ball
- Pull: Plucking a guitar string
- Non-contact and Contact Forces:
- Non-contact Force: A force applied to an object by another body that is not in direct contact with it (e.g. Gravity)
- Contact Force: A force between two objects that can only exist if they make direct contact with each other (e.g. Friction)
Examples of Forces
- Gravity
- Tension
- Normal (Contact) Force
- Kinetic Friction
- Static Friction
- Air Resistance (Drag)
- Elastic (Spring) Force
Energy
- Kinetic Energy:
- Definition: Energy an object possesses due to its motion
- Examples: A moving car on a road, a running person, wind moving a turbine
Types of Potential Energy
- Gravitational Potential Energy:
- Definition: Energy stored in an object due to its position or state
- Examples: A ball held high above the ground, water stored in a dam
- Elastic Potential Energy:
- Examples: A stretched rubber band, a compressed spring
- Chemical Potential Energy:
- Examples: Energy stored in food, batteries storing energy
Summary
- Kinetic Energy: Energy of motion
- Potential Energy: Stored energy based on position or state
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Description
Learn about the basics of forces, including definition, types, and examples. Explore how forces can change an object's speed, direction, and shape.
