Do The Math

Chapter 16

Work each of these problems in your notebook using the proper format. If you do not use the proper format, your work will not be graded.

P = F A

F1= F2

A1 A2

1. A pan’s area of contact on a stove is 0.2 m2. If the pan’s weight is 12 N, what is the pressure the pan exerts on the stove?

A = 0.2m2

F = 12N

P = ? (Pa)

P = F A

P = 12 .2

P = 60 Pa

2. A book touches an area of .06 m2 on a desktop. If the book’s weight is 8 N, what is the pressure the book exerts on the desk?

A = 0.6m2

F = 8N

P = ? (Pa)

P = F A

P = 8 .6

P = 1.333 Pa

3. A skater has a weight of 500 N. The skate blades are in contact with the ice over an area of 0.05m2. What is the pressure the skater exerts on the ice?

Your Turn!

4. A person weighs 450 N. Their shoes come in contact with the floor over an area of 0.25m2. What is the pressure the person exerts on the floor?

Your Turn, Again!!

5. A crate applied a force of 1,200 N on a 20 m2 piston. What force needs to be exerted on a 0.5 m2 piston to lift the crate?

F1 = 1,200 N

A1 = 20 m2

F2 = ? N

A2 = .5 m2

F1 = F2

A1 A2

600 = 20 F2

30 m2 = F2

120020

= F2

.5

5. A crate applied a force of 1,200 N on a 20 m2 piston. What force needs to be exerted on a 0.5 m2 piston to lift the crate?

F1 = 1,200 N

A1 = 20 m2

F2 = ? N

A2 = .5 m2

F1 = F2

A1 A2

600 = 20 F2

30 m2 = F2

120020

= F2

.5

6. A hydraulic lift is used to lift a heavy machine that is pushing down on a 2.2 m2 piston with a force of 2,700 N. What force needs to be exerted on a 0.055 m2 piston to lift the machine?

Your Turn!

Problems 3, 4, 6 are your

homework. You have the others as

examples.