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October 12, 2005

Gears sizes and force

Q. If you want to minimize the force you exert on the pedals what sizes gears should you have at the crank sprocket (at the petals) and the freewheel sprocket (at the wheel)?

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October 10, 2005

Bike gears and work

Q. How do the concepts of work and energy relate to the gears on a bicycle?

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September 17, 2005

Two falling balls of different masses

Q: In DR we dropped 2 balls of different masses from the same height and saw that they hit the floor at the same time. This is confusing to me - shouldn't the lighter ball hit first since it has less inertia and the same gravity as the heavier ball?

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