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Ch. 4 Forces

Welcome. To. Ch. 4 Forces. Today's Topics. NEXT. Forces. NEXT. Balanced & Unbalanced. NEXT. Work, work work. NEXT. Chapter 4 Vocabulary. NEXT. Chapter 4 This 'n That. NEXT. FORCES. 100. 200. 300. 400. 500. Forces. Balanced/ Unbalanced. 100. 200. 300. 400. 500.

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Ch. 4 Forces

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  1. Welcome To Ch. 4 Forces

  2. Today's Topics NEXT

  3. Forces NEXT

  4. Balanced & Unbalanced NEXT

  5. Work, work work... NEXT

  6. Chapter 4 Vocabulary NEXT

  7. Chapter 4 This 'n That NEXT

  8. FORCES 100 200 300 400 500 Forces Balanced/ Unbalanced 100 200 300 400 500 Work, work, work… 100 400 500 200 300 Ch 4 Vocab. 100 200 300 500 400 This ‘n That 500 100 200 300 400 Team Scores Team One Team Three Team Five Final Jeopardy Team Two Team Four Team Six

  9. A push or pull that causes motion. Show Answer

  10. force 100 Back to Board

  11. The force of attraction between all objects. Show Answer

  12. gravity 200 Back to Board

  13. What kind of force opposes motion? Show Answer

  14. friction 300 Back to Board

  15. What kind of force is needed to keep your nametags on the side of your desks? Show Answer

  16. Magnetic Force 400 Back to Board

  17. Why does Mr. Heinz only weigh 35 pounds on the moon? Show Answer

  18. The force of gravity is less on the moon. Bonus (100pts): Why is the force of gravity less on the moon than Earth? Because the moon is smaller than Earth. 500 Back to Board

  19. One puppy pulls on a rope toy. His sister pulls on the other end with a balanced force. Does the rope toy move? Show Answer

  20. NO! Balanced forces cancel each other out, and there is no movement. 100 Back to Board

  21. A baseball is sitting on the top of a cone. Are the forces balanced or unbalanced? Show Answer

  22. Balanced Bonus (100pts.) How can you make the forces unbalanced? Hit the ball! 200 Back to Board

  23. Mr. Doofus and Mr. Do-right are arm wrestling. Mr. Doofus exerts a force of 20 N to the left. Mr. Do-right exerts a force of 30 N to the right. What is the net force? Show Answer

  24. 10 N to the right Mr. Do-right wins! 300 Back to Board

  25. Why is it easer to lift a heavy weight that is under water, than on land? Show Answer

  26. Buoyant forces push up on objects that are in water. 400 Back to Board

  27. Use the words “buoyant force” to explain why a ping pong ball floats and a golf ball sinks? Show Answer

  28. A ping pong ball floats because the buoyant force of water is greater than its weight. A golf ball sinks because the buoyant force of water is less than its weight. 500 Back to Board

  29. A bar that makes it easier to move things. Show Answer

  30. lever 100 Back to Board

  31. True or False? Simple machines make less work. Why? Show Answer

  32. False. Simple machines make work easier, not less work. 200 Back to Board

  33. Which of the following demonstrates work being done? (list them on your board) • Mr. Heinz pushing against a wall. • Mr. Heinz hammering a nail through a board. • Mr. Heinz riding his bike down the street. • Mr. Heinz jumping on a trampoline. • Mr. Heinz telling you to put your eyes on him. • Mr. Heinz sitting on his stool. • Mr. Heinz opening the door and walking out. • Mr. Heinz reading science homework. Show Answer

  34. Which of the following demonstrates work being done? (put a √ next to any of them) • Mr. Heinz pushing against a wall. • Mr. Heinz hammering a nail through a board. • Mr. Heinz riding his bike down the street. • Mr. Heinz jumping on a trampoline. • Mr. Heinz telling you to put your eyes on him. • Mr. Heinz sitting on his stool. • Mr. Heinz opening the door and walking out. • Mr. Heinz reading science homework. 300 Back to Board

  35. Match the name of the simple machine to its picture. A B C D E 1. Inclined Plane 2. Lever 3. Wedge 4. Pulley 5. Wheel and Axle Show Answer

  36. Bonus (100pts): Which simple machine is actually 2 inclined planes put together? A B C D E 1. Inclined Plane 2. Lever 3. Wedge 4. Pulley 5. Wheel and Axle 400 Back to Board

  37. Which ones are compound machines? 4 3 1 2 7 6 5 Show Answer

  38. 500 Back to Board

  39. A device, made only of a few parts that makes work easier. Show Answer

  40. Simple machine 100 Back to Board

  41. A ramp or sloping surface. Show Answer

  42. Inclined Plane 200 Back to Board

  43. A wheel with a groove for a rope. Show Answer

  44. pulley 300 Back to Board

  45. A device made up of 2 or more simple machines. Show Answer

  46. Compound Machine 400 Back to Board

  47. The balance point of a lever. Show Answer

  48. Fulcrum Bonus (100pts) Draw an arrow to the fulcrum on this wheel barrow. 500 Back to Board

  49. What kind of force is acting on this compass? Show Answer

  50. Magnetic forces 100 Back to Board

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