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
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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