Question

A boy weighing 60 kgf is wearing shoes with heel
of area of cross section 20 cm', while a girl weighing
45 kgf is wearing sandals with heel of area of cross
section 1.5 cm². Compare the pressure exerted on
ground by their heels when they stand on the heel
of one foot.​

Answer 1

Explanation:

pressure is force per unit area

so pressure by boy= 60*9.8/.2*.2

similarly, pressure by girl= 45*9.8/.15*.15

so equation=

60*9.8*0.15*0.15/0.2*0.2*45*9.8

3/4

ratio of pressure exerted by boy:girl = 3:4