# Introduction To Physical Science

## Chapter 12: Forces and Fluids

### Section 3 Self-Check Quiz-Eng.

 1 According to Pascal, pressure applied to a fluid __________. Need a Hint? A) decreases as it moves through the fluid B) increases as it moves through the fluid C) is transmitted unchanged throughout the fluid D) fluctuates as it is transmitted throughout the fluid 2 Bernoulli's principle states that as the velocity of a fluid __________, the pressure exerted by the fluid __________ . Need a Hint? A) increases, increases B) increases, decreases C) decreases, decreases D) decreases, increases 3 A(n) __________ uses a fluid to increase an applied force. Need a Hint? A) wheel and axle B) hydraulic system C) simple machine D) compound machine 4 A force of 150 N is applied to a 25 cm 2 piston in a hydraulic machine. What is the area of a larger piston if the force available in it is 450 N? Need a Hint? A) 75 cm2 B) 8.33 cm2 C) 100 cm2 D) 300 cm2 5 The area of the small piston in a hydraulic system is 1 m2. The area of the larger piston is 4 m2. If a force of 10 N is applied to the small piston, what is the force available in the large piston? Need a Hint? A) 4 N B) 40 N C) 400 N D) Not enough information is given. 6 How does Bernoulli's principle explain how airplanes fly? Need a Hint? A) Air pressure is greater on the top of the wings, creating lift. B) The backward force exerted by an engine creates an equal and opposite push, resulting in lift. C) Air pressure is greater below the wings, creating lift. D) The air pressure on top of the wing is equal and opposite to the air pressure on the bottom, creating a balanced upward force.