• Document: Section 12.1 Forces (pages )
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Name ___________________________ Class ___________________ Date _____________ Chapter 12 Forces and Motion Section 12.1 Forces (pages 356–362) This section describes what forces are and explains how forces affect the motion of various objects. Reading Strategy (page 356) Relating Text and Visuals As you read about forces, look carefully at Figures 2, 3, and 5 in your textbook. Then complete the table by describing the forces and motion shown in each figure. For more information on this Reading Strategy, see the Reading and Study Skills in the Skills and Reference Handbook at the end of your textbook. Forces and Motion Figure Is Net Force 0? Effect on Motion 2A Yes None 2B Yes None 3 Yes None 5A Yes None 5B No Potted plant accelerates What is a Force? (pages 356–357) 1. A force is defined as a(n) push or a(n) pull that acts on an object. © Pearson Education, Inc., publishing as Pearson Prentice Hall. All rights reserved. 2. Is the following sentence true or false? A force can act to cause an object at rest to move or it can accelerate an object that is already moving. true 3. How can a force change the motion of an object that is already moving? A force can accelerate a moving object by changing its speed, its direction, or both. 4. Circle the letter of the best answer. What force causes a 1-kg mass to accelerate at a rate of 1 meter per second each second? a. 1 kg/m•s2 b. 1 kg/s c. 1 kg•m d. 1 newton Combining Forces (pages 357–358) 5. The overall force acting on an object after all the forces are combined is the net force .

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