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Newton’s Laws of Motion

Newton’s Laws of Motion. Chapter 2 Section 2 Review. 1. What is Newton’s First Law?. A. An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force.

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Newton’s Laws of Motion

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  1. Newton’s Laws of Motion Chapter 2 Section 2 Review

  2. 1. What is Newton’s First Law? • A. An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force. • B. Every action has an equal and opposite reaction. • C. The acceleration of an object depends on its mass and the amount of force applied. • D. You must eat an apple a day to be healthy

  3. ANSWER: Newton’s First Law is… • A. An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force.

  4. 2. What is Newton’s Second Law? • A. An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force. • B. Every action has an equal and opposite reaction. • C. The acceleration of an object depends on its mass and the amount of force applied. • D. You must eat an apple a day to be healthy

  5. ANSWER: Newton’s Second Law is… • C. The acceleration of an object depends on its mass and the amount of force applied.

  6. 3. What is Newton’s Third Law? • A. An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force. • B. Every action has an equal and opposite reaction. • C. The acceleration of an object depends on its mass and the amount of force applied. • D. You must eat an apple a day to be healthy

  7. ANSWER: Newton’s Third Law is… • B. Every action has an equal and opposite reaction.

  8. 4. The reaction force of a chair you are sitting on… • a. is greater than the action of your weight. • b. is equal to the action of your weight. • c. is determined by many factors. • d. varies.

  9. Answer: • b. is equal to the action of your weight.

  10. 5. If you are sitting still on a moving bus, is your body at rest or in motion? • a. At rest • b. In motion • c. Both at rest and in motion • d. Neither at rest or in motion

  11. ANSWER • b. In motion

  12. 6. Which of the following is the equation for Newton’s second law of motion? • a. F= m × a • b. m=F × a • c. a=m ÷ F • d. F=m ÷ a

  13. ANSWER: The equation for Newton’s Second Law is… • A. F = mxa

  14. 7. Which of the following will increase the acceleration of an object that is pushed by a force? • a. Decreasing the mass of the object • b. Increasing the mass of the object • c. Increasing the force pushing the object • d. Both A and C

  15. ANSWER • D.Both A and C

  16. 8. Which is a common unbalanced force acting on objects in motion? • a. Inertia • b. Acceleration • c. Friction • d. Speed

  17. ANSWER: • c. Friction

  18. 9. What force is necessary to accelerate a 70 kg object at a rate of 4.2 m/s/s? • a. 66.8 m/s/s • b. 16.6 N • c. 74.2 m/s/s • d. 294 N

  19. ANSWER: • d. 294 N

  20. 10. According to Newton’s first law of motion, a moving object that is NOT acted on by an unbalanced force will… • a. remain in motion • b. eventually come to a stop • c. change its momentum • d. accelerate

  21. ANSWER • a. remain in motion

  22. 11. Why are airbags important in cars? • a. They provide unbalanced forces to stop the motion of the people. • b. They prevent people from hitting the windshield or dashboard. • c. It’s fun when they inflate. • d. Both a & b.

  23. ANSWER • d. Both a & b.

  24. 12. Which of the following is NOT an action/reaction force pair? • a. The forces between a bat and a ball • b. The attractive force between a falling ball and Earth • c. The force of propulsion and the force of gravity on an airplane • d. The forces between a grasshopper and the ground

  25. ANSWER • c. The force of propulsion and the force of gravity on an airplane

  26. 13. The action force and the reaction force are… • a. a pair. • b. equal in size. • c. opposite in direction. • d. all of the above.

  27. ANSWER • d. all of the above.

  28. 14. Acceleration will _______ when a larger force is exerted. • a. increase • b. decrease • c. double • d. stay the same

  29. ANSWER • a. increase

  30. 15. Inertia is… • a. the same as gravity. • b. very similar to friction. • c. the tendency of matter to resist a change in motion. • d. a country in Asia.

  31. ANSWER • c. the tendency of matter to resist a change in motion.

  32. QUIZ ON THURSDAY! • Remember to study! • Study some more! • It’s your last quiz grade for the trimester, do your best!

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