How and why friction is cut down in a hovercraft,on a dance floor and in a car engine?

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F1 racing, which is faster. rolf bilands beo sidecar outfit or f1 car of the 1980 s?

Hovercraft - friction is reduced by hovering above the surface. Thus reduce contact against water.

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Dancefloor - Waxed floor is more slippery than pavement. To reduce shoe wear and ease movement.

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Car engine - Lube oil reduce friction by forming slippery surface on metal contact area. Also ball bearings provide smooth motion transition.

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The idea is to reduce or eliminate any chance of energy lost caused by friction. i.e. if there is no lube oil inside a car engine, metal contact against metal will cause friction and kinetic energy transform to heat(which is unwanted energy formation). Causing loss of kinetic energy.

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What is BHP (break horse power)? I know the more it is the faster your car is but what exactly does...?

hovercraft - rides on air as opposed to "cutting" through water
floor - wax makes the floor slippery by filling surace irregularities
engines - metal parts ride on a surface of oil

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Blue/White Thruway Question Mark Signs?!?

Hovercraft ,air under the skirt .
Dance floor ,friction powder
Car engine oil ..

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