Bicycle Energy

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Bicycle Energy

• And Health Benefits

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Presentation Overview

• Mechanical Energy
• Electrical Energy
• Circuit Energy
• Health Benefits

3
Mechanical Energy

• Legs go up and down (power bike)
• Pedals go around
• Chain connects the gears which drives the wheels

4
Electrical Energy

• Wheel moving around and around turns the shaft of
  the generator (rolling contact)
• Generator works by..(see How a generator works)

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Generator Overview
hyperphysics/phy_aster.gsu.edu/hbase/magnetic/genh
ow.html
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Circuit Energy

• This energy is used to power circuit elements.
• Voltage-volts
• Current-amps
• Resistance-ohms
• Power- horsepower, watts

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3 Basic Units in Electricity

• Voltage (V), Current (I), and resistance (r).

• A neat analogy to help understand these terms is
  a system of plumbing pipes.
• Voltage the water pressure
• Current to the flow rate
• Resistance the pipe size

I V/r
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Horsepower

• The term was invented by James Watt.
• Watt was working with ponies lifting coal at a
  coal mine, and he wanted a way to talk about the
  power available from this animal.
• What horsepower means is In Watts judgement,
  one horse can do 33,000 foot-pounds of work every
  minute.
• Horsepower can be converted into other units as
  well.
• 1 horsepower 746 watts or 2,545 BTU (British
  thermal units).
• 1 BTU 252 gram-calories or .252 food calories.
• of horsepower cal. burned/minute.

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Health Benefitsof Exercising

• Makes your heart happy.
• The heart is a muscle that needs to be kept
  strong.
• Keeps you flexible.
• Can you touch your toes?
• Helps maintain a healthy weight.
• Makes you feel good.
• Exercise two or three times a week, for 20 to 30
  minutes at a time.

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Exercise Activities

• Biking
• Swimming
• Basketball
• Rollerblading
• Soccer
• Dancing
• Jumping rope
• Baseball
• Ice or roller hockey