Question

a man whose mass is 90kg stand on his feet on a floor. the total area of contact of his two feet with a floor is 0.36 m square. how much is the pressure exerted by him on the floor?
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Answer 1

Answer:

Given :

mass is 90 kg

Area : 0.03m2

Acceleration due to gravity(g): 10m/s2

Step-by-step explanation:

Pressure is equal to:. thrust/area

m*g/A

90*0.03/10

0.27 pascal

Answer 2

Answer:

Given that,

Mass M=90kg

Now, If the elevator falls freely

So, the downward acceleration of the man in the elevator  is

a=g

Now, the force is

The force exerted by the floor on a man = actual weight of man − net upward force on a man

 F=ma−mg

F=mg−mg

F=0 N

Hence, the force exerted by the floor on a man is zero