Question

The pressure in each of the four tyre of a car is 1.5*10^4 kgf/m^2 while each tyre has area of contact 25*10^-4 m^2 find the wait of the car.

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Answer 1

Given, pressure, P=2.0×10

5

;

area of tyre, A=0.024m

2

;

weight of automobile, W=?

Since, automobile is supported by four tyres, load or force (F) on each tyre is one fourth of the weight of the automobile, i.e., F = W/4

Pressure, P=

A

F

or P=

A

(W/4)

=

4A

W

W=4AP=4×0.024×2×10

5

=1.92×10

4

N.

Hence, the weight of the automobile is =1.92×10

4

.