Force, Pressure, & Area

A pressure of 20 Pa is applied by an 8‎000 N force to a square area. What is the length of a side of the square?

• 15 m

• 20 m

• 25 m

• 40 m

An empty water tank has a rectangular base with side lengths of 1.2 m and 2.3 m. The weight of the tank applies a pressure of 350 Pa to the surface it is resting on. What is the weight of the tank?

• 690 N

• 966 N

• 666 N

• 996 N

A sofa with a mass of 125 kg has a base with an area of 2.5 .What pressure does the sofa apply to the ground beneath it?

• 940 Pa

• 650 Pa

• 370 Pa

• 490 Pa

A dancer with a mass of 50 kg is standing on the tips of the toes of one of her feet. She exerts a pressure of 490 kPa on the tips. What is the area, in square centimeters, of the part of the foot on which she stands?

In the figure, two books of the same dimensions are shown in different positions. The density of the material used in book A is higher than that used in book B. Which of the positions shown causes higher pressure on the ground

• A

• B

• C

• D

Two identical cubes are placed on top of each other. If the top cube is removed from above the other and placed next to it, as shown in the figure, the pressure due to the cubes on the surface underneath them will

• remain constant

• decrease to the half

• increase to the double

• be indeterminable

• 5208 Pa

• 9671 Pa

• 2640 Pa

• 7813 Pa

• 25400 Pa

• 24500 Pa

• 54000 Pa

• 45000 Pa

• 1.808 MN

• 3.054 MN

• 1.556 MN

• 2.431 MN

• 1500

• 750

• 2000

• 1250