How Energy-Capturing Devices Work
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Questions and Answers

What type of energy is converted into electrical energy by the generator?

  • Thermal energy
  • Kinetic energy (correct)
  • Chemical energy
  • Potential energy

The electrical energy generated is used directly to power devices without being stored first.

False (B)

What is the role of the battery in the energy-capturing system?

To store electrical energy as potential energy.

Walking turns the __________ of a generator.

<p>wheel</p> Signup and view all the answers

Match the following terms with their definitions:

<p>Kinetic Energy = Energy of motion Potential Energy = Stored energy Generator = Device that converts energy Battery = Device that stores electrical energy</p> Signup and view all the answers

What form of energy does the movement of a backpack while walking represent?

<p>Kinetic energy (D)</p> Signup and view all the answers

An energy-capturing backpack can use kinetic energy to charge a battery.

<p>True (A)</p> Signup and view all the answers

How does an energy-capturing backpack typically capture energy?

<p>By using springs to allow the heavy part to bounce up and down.</p> Signup and view all the answers

The heavy part of an energy-capturing backpack is suspended from ________ to facilitate bouncing.

<p>springs</p> Signup and view all the answers

Match the following energy-related terms with their definitions:

<p>Kinetic energy = Energy of motion Potential energy = Stored energy Mechanical energy = Energy associated with the motion and position of an object Electrical energy = Energy caused by the flow of electric charge</p> Signup and view all the answers

What is the main purpose of an energy-capturing bicycle?

<p>To capture and store energy from pedaling (C)</p> Signup and view all the answers

Kinetic energy from the bicycle wheel can be converted into electrical energy.

<p>True (A)</p> Signup and view all the answers

What device is used to charge small devices while walking with an energy-capturing backpack?

<p>a generator</p> Signup and view all the answers

When the kinetic energy is converted, it becomes __________ energy that can be stored in a battery.

<p>potential</p> Signup and view all the answers

Match the following components with their functions in an energy-capturing bicycle:

<p>Kinetic energy = Energy from pedaling is captured Generator = Converts kinetic energy to electrical energy Battery = Stores energy for future use Motor = Provides assistance while riding uphill</p> Signup and view all the answers

What is the primary function of the generator in the Copenhagen Wheel?

<p>To charge the battery using kinetic energy from the rider (C)</p> Signup and view all the answers

The energy-capturing knee brace uses kinetic energy to power external devices directly.

<p>False (B)</p> Signup and view all the answers

What additional feature helps a rider on the Copenhagen Wheel when they need extra power?

<p>The battery</p> Signup and view all the answers

The energy-capturing knee brace contains a __________ that converts kinetic energy into electrical energy.

<p>generator</p> Signup and view all the answers

Match the following components with their functions in energy-capturing devices:

<p>Generator = Converts kinetic energy to electrical energy Battery = Stores electrical energy for later use Copenhagen Wheel = Assists in pedaling with stored energy Knee Brace = Captures energy from leg movement</p> Signup and view all the answers

Flashcards

Kinetic Energy in Backpack

The energy of motion in a moving backpack. This up and down motion while walking.

Energy-Capturing Backpack

A backpack that converts kinetic energy (motion) into electrical energy to charge a battery.

Spring-Powered Energy Conversion

A method for converting walking motion to energy using springs attached to a heavy part of the backpack.

Hiking Motion & Kinetic Energy

The up-and-down motion while walking produces kinetic energy that a backpack can capture.

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Battery Charging from Kinetic Energy

Energy-capturing backpacks use the kinetic energy from walking to charge the battery.

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Kinetic energy

The energy of motion, like the movement of a generator wheel.

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Electrical energy

The energy that powers electrical devices, like a cell phone.

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Potential energy

Stored energy, like energy stored in a battery.

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Generator

A machine that converts kinetic energy into electrical energy.

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Energy-capturing bicycle

A bicycle that converts the rider's pedaling energy into electrical energy and stores it in a battery.

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Copenhagen Wheel

A device that stores energy from a bicycle wheel.

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Battery

A device that stores electrical energy.

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Energy transfer

The process of moving energy from one form to another.

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Study Notes

Hand-Crank Flashlight

  • Hand-crank flashlights use human energy
  • They never require batteries
  • Cranking turns a generator
  • The generator converts kinetic energy to electrical energy
  • The energy is stored as potential energy in the battery
  • The battery powers the light bulb
  • The energy initially comes from your body's kinetic energy
  • Kinetic energy is transformed into electrical energy

How a Hand-Crank Flashlight Works

  • Turning the crank causes kinetic energy
  • The crank turns the generator inside the flashlight
  • The generator charges the battery
  • The battery converts potential energy to light

Energy-Capturing Backpack

  • Backpacks convert kinetic energy to power devices
  • Motion from walking makes the generator in the backpack move
  • The generator charges the battery
  • The battery powers a cell phone or other electrical device
  • Motion from walking powers a generator that charges a battery
  • Battery can be used to power small devices

Energy-Capturing Bicycle

  • Bicycle wheels use kinetic energy
  • Braking converts spinning wheel's kinetic energy into electrical energy
  • This energy is stored in a battery as potential energy
  • This potential energy can power a motor that could help the rider
  • The Copenhagen Wheel can store energy for later use

Energy-Capturing Knee Brace

  • Knee brace turns kinetic energy of leg movement into electrical power
  • Bending and straightening your knee makes the generator inside the knee brace spin
  • Kinetic energy is converted to electrical energy and stored in a battery
  • The battery powers small devices like phones
  • The knee brace converts knee motion into electrical energy used to charge a battery
  • Energy can be used to power a device

Energy-Capturing Rocking Chair

  • Rocking chairs convert kinetic energy into electrical energy
  • Rocking motion spins a generator
  • The generator converts this energy into potential energy and stores it in a battery
  • The battery can power small devices like lamps or cell phones
  • The kinetic energy from rocking produces a motion in the generator
  • The generator turns and charges the battery

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Related Documents

Capturing Human Energy PDF

Description

Explore the fascinating world of energy-capturing devices like hand-crank flashlights and kinetic energy backpacks. Learn how these devices convert human motion into electrical energy and power various tools without the need for batteries. Discover the mechanics behind storing and using this energy effectively.

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