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Why is it recommended to lower the pressure of tire when going through sand?

Physics Asked by user275301 on December 2, 2020

Why is it recommended to lower the pressure of tire when going through sand?

please help me I have tried very long thinking

this question is from my textbook but no answer

2 Answers

Our objective is to not get our car stuck

for that we want increase the surface area of the tire which is in contact with the sand

we can do that by letting some air to increase surface area of contact and decreasing pressure exerted on the sand by the tire

I hope it is known that pressure is inverly proportional to area

therefore by exerting less pressure on sand we sink less

Correct answer by JustJohan on December 2, 2020

Normally, when driving on a firm surface, we want tires to be as firm as possible because (a) a soft tire is inefficient since energy is lost because the tire is continuously being deformed and (b) driving on soft tires can damage the tires. But in sand or on soft ground not getting stuck it is a higher priority. Partly deflating tires increases the area of each tire in contact with the ground and so reduces the pressure on the ground.

Answered by gandalf61 on December 2, 2020

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