Question

Книга массой 150г лежит на столе.Размер книги 25см на 30см. какое примерно давление оказывает книга на стол?

Answer 1

Ответ:

.................................

Answer 2

Calculating Pressure Exerted by the Book

To calculate the pressure exerted by the book on the table, we can use the formula:

Pressure (P) = Force (F) / Area (A)

The force exerted by the book is its weight, and the area is the contact area between the book and the table.

Calculating the Force Exerted by the Book

The force exerted by the book can be calculated using the formula:

Force (F) = Mass (m) x Acceleration due to gravity (g)

Given that the mass of the book is 150g, we can convert it to kilograms (kg) for the calculation.

150g = 0.15kg

The acceleration due to gravity is approximately 9.81 m/s^2.

So, the force exerted by the book is:

F = 0.15kg x 9.81 m/s^2

F ≈ 1.47N

Calculating the Area of Contact

The area of contact between the book and the table can be calculated using the dimensions of the book.

Given that the dimensions of the book are 25cm x 30cm, we can convert them to meters for the calculation.

25cm = 0.25m

30cm = 0.30m

The area of contact (A) is:

A = length x width

A = 0.25m x 0.30m

A = 0.075m^2

Calculating the Pressure

Now, we can calculate the pressure exerted by the book on the table using the formula:

Pressure (P) = Force (F) / Area (A)

Substituting the values:

P = 1.47N / 0.075m^2

P ≈ 19.6 Pa

So, the book exerts a pressure of approximately 19.6 Pascals on the table.