Question

Q12
By his weight, a man is applying the pressure P Nm 2 on the ground. The weight of his
child is half of his weight.
How much pressure will the man apply if he is carrying his child on his shoulder?
2P
3P/2
3P
5P/2

Answer 1

Answer:

3

Explanation:

the correct answer is 3p/2 hope it's helpful

Answer 2

The man will apply 3P/2 pressure if he is carrying his child on his shoulder.

Given,

A man applies a pressure of P Nm on the ground. His child's weight is half of his weight.

To find,

The pressure is applied by him and his child if he carries his child on the ground.

Solution,

The pressure applied by the man= P Nm.

We know that pressure(P) can be calculated by dividing the force(F) by the area(A).

P=F/A.

It is also known that Force is the product of mass and acceleration.

Here, Let the mass of the man is M.

P=M×g/A

P=M×10/A.

From here, Area(A) is unknown, so let's take its value as,

A=M×10/P...equation(1)

Now, if the man carries his child, his mass will be =M +1/2M

=3/2M.

Put it in the formula of pressure,

Pressure=3/2M×10/A

The value of A can be taken from the equation 1,

Pressure=3/2M×P×10/(M×10)

=3/2P Nm.

So, the pressure applied by the father and the son is 3/2P Nm.

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