A boy weighing 60kg force is wearing shoes with heel area of cross - section 20cm^2 while a girl weighing 45kg force is wearing shoes with heel of area of cross- section 1.5cm^2. compare to the pressures exerted on the ground by their heels when they stand on the heels of one foot .
Answers
Answered by
2
Explanation:
Pressure exerted by girl P
girl
=
Area
F
girl
=
1
50×10
=500 N/cm
2
Pressure exerted by elephant P
elephant
=
Area
F
elephant
=
25
2000×10
=800 N/cm
2
So,
P
elephant
P
girl
=
8
5
Answered by
2
Answer:
Explanation:
Pressure = Force / Area
Now Force = mgh where m is mass h is height and g is gravity. Since both girl and boy have same height 1 foot and g is constant.
=> Force is directly proportional to mass
And P = F / A
=> P for Boy equivalent to = 60 kg / 20 cm^2 = 30
=> Equivalent P for girl = 45 kg / 1.5 cm^2 = 30
=> Pressure applied by girl on ground is higher than boy.
Note: Pressure calculations are not exact because we didn't put value of gravity constant also height and area is to be use in SI unit.
Thank you!
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