Question

A car of weight 6400N has 4wheels. each wheel has an area 80cm2 touching the road.Find the pressure the car puts on the ground.

Answer 1

Explanation:

Force exerted by car on the ground = weight = 6400N

A = 80cm2 = 0.008m2(for one wheel)

For all 4 wheels, A = 0.008*4 = 0.032m2

P = F/A

= 6400/0.032

= 6400000/32

= 200000N/m2

Hope it helps:)

Answer 2

Answer:

           640 Kg all of it is not acting one one wheel , it is equally distributed        

Explanation:

so the weight will be divided as

W =F = mg  640x10= 6400N

force on one foot

6400/4 =  1600N

pressure =  F/A

=  1600/80

=  20 N/cm2