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Motion, Forces, and Simple Machines Chapter 5 Test Review 1) What do you need to know to determine the speed of an object? 2) What is average speed? 3) Be able to calculate the average speed of an object and express it in the correct units. 4) Compare and contrast instantaneous speed and constant speed. 5) What is velocity? 6) How does velocity differ from speed? 7) What is acceleration? 8) Be able to calculate the acceleration of an object and express it in the correct units. 9) Compare and contrast balanced and unbalanced forces. 10) What does Newton’s first law describe? 11) What is inertia? 12) What does Newton’s second law describe? 13) What is the unit force is expressed in? 14) What does Newton’s third law explain? 15) What is work? 16) Be able to calculate work and express it in the correct units. 17) What is a machine? 18) Compare and contrast simple machines and compound machines and give an example of each. 19) Be able to list and describe the six (6) major types of simple machines and give an example of each. 20) Compare and contrast the three degrees of levers. 21) You are responsible for knowing the correct SI units to express your calculated answers in. 22) You should know the three formulas covered in this chapter: speed (velocity), acceleration, and work and how to change them to solve for any variable in the equation.