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In this lesson, we will learn how to use the formula for pressure, p = F/A, to calculate pressures that are produced by forces acting on areas.

Q1:

What pressure is exerted by a 100 N force applied to an area of 2.5 m^{2}?

Q2:

A pressure of 20 Pa is applied by an 8 0 0 0 N force to a square area. What is the length of a side of the square?

Q3:

The bases of a manβs feet have a total area in contact with the ground of 0.025 m^{2}. The manβs weight is 800 N. How much is the pressure applied by his feet to the ground in kilopascals?

Q4:

Which of the following formulas correctly shows the relationship between an applied force, the pressure that the force produces, and the area on which the force acts?

Q5:

A pressure of 75 Pa is applied by a 3β000 N force. What area is the force applied to?

Q6:

A pressure of 400 Pa is applied to an area of 2.5 m^{2}. What force applies this pressure?

Q7:

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?

Q8:

A sofa with a mass of 125 kg has a base with an area of 2.5 m^{2}. What pressure does the sofa apply to the ground beneath it?

Q9:

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?

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