What pressure does a 60.0 kg student exert on the floor

Thus the pressure exerted by the book varies by a factor of about six depending on its orientation, although the force exerted by the book does not vary. B The pressure exerted by the text lying flat is thus P = 19.6 N 0.0567 m 2 = 3.46 Г— 10 2 PaДЄ If the book is standing on its end, the force remains the same, but the area decreases: (21.0 cm)(4.5 cm)В =В (0.210 m)(0.045 m)В =В 9.5В Г—В 10 в€’3 m 2Д« The pressure exerted by the book in this position is thus P = 19.6 N 9.5 Г— 10 в€’ 3 m 2 = 2.1 Г— 10 3 Pa In SI units, the force exerted by the book is therefore FВ = maВ =В (2.00 kg)(9.8067 m/s 2)В =В 19.6 (kg In EarthвЂ™s gravitational field, the acceleration is due to gravity (9.8067 m/s 2 at EarthвЂ™s surface). Recall from Chapter 5 'Energy Changes in Chemical Reactions' that the force exerted by an object is FВ = ma, where m is its mass and a is its acceleration. The force exerted by the book does not depend on its orientation.

, after the French mathematician Blaise Pascal (1623вЂ“1662):ДЄssuming a paperback book has a mass of 2.00 kg, a length of 27.0 cm, a width of 21.0 cm, and a thickness of 4.5 cm, what pressure does it exert on a surface if it isДЄ Calculate the force exerted by the book and then compute the area that is in contact with a surface.Д« Substitute these two values into Equation 10.1 to find the pressure exerted on the surface in each orientation. The pascal is newtons per square meter: N / m 2. The SI unit for pressure, derived from the SI units for force (newtons) and area (square meters), is the newton per square meter (N/m 2), which is called the pascal (Pa) The SI unit for pressure. For scientific measurements, however, the SI units for force are preferred. In the English system, the units of force are pounds and the units of area are square inches, so we often see pressure expressed in pounds per square inch (lb/in 2, or psi), particularly among engineers. The units of pressure are derived from the units used to measure force and area. When we use a hose to wash a car, for example, we can increase the pressure of the water by reducing the size of the opening of the hose with a thumb. We know from Equation 10.1 that applying the same force to a smaller area produces a higher pressure. Pressure is dependent on both the force exerted and the size of the area to which the force is applied.

180 mmhg to atm