Arealbot Arealbot

24-04-2019
Chemistry

contestada

A book with a weight of 12 N rests on its back cover. If the back cover measures 0.21 m by 0.28 m, how much pressure does the book exert?

A. 42 Pa

B. 57 Pa

C. 12.46 Pa

D. 204 Pa

Respuesta :

12-10-2019

Answer:

option D = 204 Pa

Explanation:

Given data:

Weight of book = 12 N

Area of book = 0.21 m × 0.28 m = 0.0058 m²

Pressure of book = ?

Solution:

formula

pressure = force / area

P = f/ A

now we will put the values in formula,

P = 12 N/ 0.0058 m²

P= 204 Nm⁻² ( Nm⁻²= Pa)

P = 204 Pa

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