# Physical Science: Motion, Forces, and Energy, Book M

## Chapter 3: Forces and Fluids

### Standardized Test Practice

 1. A force of 17 N is exerted on an area of 0.20 m2. What is the pressure? A) 85 Pa B) 0.68 Pa C) 3.4 Pa D) 67 Pa 2. A child throws two balls into water. One ball floats and one sinks. Which of these is correct? A) The floating ball has a greater density B) The floating ball has a lower density. C) The sinking ball has greater volume. D) The sinking ball has smaller volume. 3. According to Bernoulli's principle, which of the following happens when the speed of a fluid increases? A) The force exerted by the fluid decreases. B) The force exerted by the fluid increases. C) The pressure exerted by the fluid decreases. D) The pressure exerted by the fluid increases. 4. Why is the pressure exerted by the nail large? (2.0K) A) The nail tip is large. B) The nail tip is small. C) The nail has lower density than the wood. D) The nail has higher density than the wood. 5. The pressure inside the fluid of a hydraulic system is increased by 875 Pa. What is the increase in the force exerted on a piston that has an area of 0.060 m2? A) 15 N B) 28 N C) 69 N D) 53 N 6. Which of the following exerts the greatest pressure on the ground? A) a 35-kg boy standing on one foot B) a 55-kg boy standing on one foot C) a 35-kg boy standing on both feet D) a 55-kg boy standing on both feet 7. Which of the substances will not float in water? (10.0K) A) ice and balsa wood B) ice and lead C) balsa wood and sugar D) lead and sugar 8. Which of the substances has a volume of 18 cm3 if its mass is 28 g? (10.0K) A) balsa wood B) ice C) lead D) sugar 9. Which of the following is explained by Pascal's principle? A) airplane wings lifting into the air B) a heavy ship floating in water C) hot air rising in a fireplace D) a hydraulic system lifting heavy weights 10. What is the mass of a 11-cm3 strip of copper if its density is 8.9 g/cm3? A) 1.2 g B) 98 g C) 8.1 g D) 42 g
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