Question

how much does a car weighr if each tyre cover of 4cm^2 and exert a pressure of 100000Nm^-2 on the ground it is physics questions ​

Answer 1

Weight = 160 N

Step-by-step explanation:

The weight of an object is a measure of the gravitational force on the object. So that weight is synonymous to the force applied by the object.

i.e Weight = mass x gravitational force

Also, the pressure of an object is the ratio of its force to area covered by the object. So that;

P =
`(F)/(A)`

Given that: area = 4
`cm^(2)` (0.0004
`m^(2)`), and pressure = 100 000 N
`m^(-2)`.

Then;

F = PA

= 100 000 N
`m^(-2)` x 0.0004
`m^(2)`

F = 40 N

The force applied on the ground by each of the four tyres of the car is 40 N.

Thus, the weight of the car = 4 x 40 N

= 160 N