Plz explain

Question

Pairs of racing cars, for example, bunch up to increase their speed. the lead car benefits from a drop in resistance when the slight vaccum at its rear is filled, and the car in drafting position benefits as it is partially shielded from the wind.

Cbsteh · Accepted Answer

You need to understand physics and a racing term called "drafting" to understand your given sentence. Here is one link that will help to explain it nicely: http://www.aerospaceweb.org/question/aerodynamics/q0092.shtml

Essentially, the lead car, going at high speeds in particular, will create a high density/pressure of air at the front of the car, but a low density/pressure of air at its back. This difference of air pressure creates a drag (friction) which slows the car.

But if another car (at the back) drives up close enough to the lead car, the two cars sort of merge as one car, so the lead car loses its low pressure behind it, and the trailing car does not have this high pressure of air in front of it. The net result is both cars are able to take advantage of this partnership to increase their speeds.

This up-close driving by the trailing car is called drafting, and it is a tactic often used in racing, be it involving cars, bicycles, skates, running or boats.

Chris

Clive · Answer

Hi,
I don't think that the leader gains anything noticable in relatively low-speed sports like swimming, running and biking.

Best wishes, Clive

Anonymous · Answer

thanks cbsteh.

Anonymous · Answer

thanks chris. it was very helpful.

Plz explain

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