Question

4. Calculate the pressure exerted on the flo by a boy standing on both feet if the weight of the boy is 40kg. (Assume that the area of contact of each shoe is 6 cm by 25 cm.) 1kg wt = 10 N​

Answer 1

For the given question we can use the formula, F=mgF=mg where F is the gravitational force, m is the mass of the body and g is the acceleration due to gravity. We know that, P=FAP=FA where P is the pressure exerted by a body, F is the force acting on the body and A is the area where the force acts.

We are given that a boy is standing on both feet on the floor. The weight of the boy is 40kg and the area of contact of each shoe is 6 cm by 25 cm .

We know that 1kgwt=10N

Hence, 40kg wt can be converted to 40×10=400N40×10=400N

The area of contact of each shoe=6cm×25cm=(6100×25100)