Chapter 3

Question 1

pressure

Answer 1

the amount of force exerted on a given area

Question 2

fluid

Answer 2

any material that can flow and take the shape of its container

Question 3

pascal

Answer 3

the SI unit for pressure

Question 4

atmospheric pressure

Answer 4

the pressure caused by the weight of the atmosphere

Question 5

buoyant force

Answer 5

the upward force that fluids exert on all matter

Question 6

Archimedes’s principle

Answer 6

states that the buoyant force on an object in a fluid is an upward force equal to the weight of the fluid that the object takes the place of, or displaces

Question 7

Bernoulli’s principle

Answer 7

states that as the speed of a moving fluid increases, the fluid’s pressure decreases

Question 8

lift

Answer 8

an upward force on an object that moves in a fluid

Question 9

thrust

Answer 9

the upward force produced by a planes engine

Question 10

drag

Answer 10

the force that opposes or restricts motion in a fluid

Question 11

Pascal’s principle

Answer 11

states that a change in pressure at any point in an enclosed fluid will be transmitted equally to all parts of that fluid