* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
SECTION FLUIDS CAN EXERT A FORCE ON OBJECTS. 12.4 Reading Study Guide A BIG IDEA Newton’s KEY CONCEPT laws apply to all forces. Fluids can exert a force on objects. Vocabulary buoyant force the upward force on objects in a ﬂuid Bernoulli’s principle states that the faster a ﬂuid moves, the less pressure it exerts on surfaces or openings it ﬂows over Pascal’s principle states that when an outside pressure is applied at any point to a ﬂuid in a container, that pressure is transmitted throughout the ﬂuid with equal strength. Review 1. You can increase the pressure exerted on an object by increasing the ____________ or decreasing the ____________. Take Notes Fluids can exert an upward force on objects. 2. Why does a boat ﬂoat in water? A. Buoyancy 3. Fill in the four square diagram for buoyant force. Definition: Examples: Objects seem BUOYANT FORCE Characteristics: Direction of force is in water. Non-examples: . B. Density and Buoyancy 4. A piece of ironwood sinks in water. How does the density of ironwood compare to the density of water? MOTION AND FORCES, CHAPTER 12, READING STUDY GUIDE A 183 CHAPTER 12 Gravity, Friction, and Pressure Copyright © by McDougal Littell, a division of Houghton Mifﬂin Company I. 5. In the diagram on the right, which beaker contains a buoyant force that is equal to the force of the weight? II. The motion of a ﬂuid affects its pressure. A. Bernoulli’s Principle 6. Complete the main idea chart about Bernoulli’s principle. The motion of a fluid The faster a fluid moves, B. Applying Bernoulli’s Principle The air above the wings of an airplane in ﬂight has a lower pressure than the air under the wings. Label the area where the air is moving the fastest. III. Forces can be transmitted through ﬂuids. A. Pascal’s Principle 8. The system below is ﬁlled with ﬂuid. Piston A is pushed down with a force of 10 N. Does piston B exert an upward force that is more than, less than, or the same amount as the force on Piston A? B A B. Hydraulics 9. Name two types of machines that use hydraulics to do work. 184 MOTION AND FORCES, CHAPTER 12, READING STUDY GUIDE A Copyright © by McDougal Littell, a division of Houghton Mifﬂin Company CHAPTER 12 Gravity, Friction, and Pressure 7.