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Marking the Mechanical Systems Quiz I

Marking the Mechanical Systems Quiz I. Be sure to write in correct answers and make corrections to help the other person study for the upcoming quiz

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Marking the Mechanical Systems Quiz I

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  1. Marking the Mechanical Systems Quiz I

  2. Be sure to write in correct answers and make corrections to help the other person studyfor the upcoming quiz • Ask questions if you are unsure about an answer I have on the board… this is your chance to get feedback and to make sure you are on the tight track • PLEASE MAKE SURE YOU ARE KEEPING A TALLEY OF TOTAL MARKS IN THE MARGIN SO THAT I CAN SEE HOW YOUR DOING First Things First…

  3. Inclined Plane D • Lever E • Persian Wheel A • Wheel & Axle F • Pulley G • Archimedes Screw C • Wedge B A This circular device was designed to capture the energy provided by falling water B This simple machine is designed to concentrate a force from a larger surface area, down to a small surface area C This device was invented to turn rotational motion into linear motion D This simple machine makes it possible to raise an object against the force of gravity with less force, but you must move the actual object over a longer distance. E This simple machine can come in many forms depending on where the load, effort, and fulcrum are positioned. F This device rotates in a one-to-one ratio which can cause increases in speed ratio but decreases in force… or visa versa G This simple machine can reduce the input force needed to move an object as long as it is attached in the right location, otherwise it won’t reduce the force at all Questions 1… Matching • Total of 7 marks for this question

  4. Questions 2 • 1mark for showing the Ramp in the diagram If you are in the middle of barren forest and have a heavy barrel that you are unable to pick up but you do have the strength to roll, name the easiest simple machine that you could use to help you get the barrel into the back of a pickup truck just by using a few logs that are laying around. Also, draw a diagram to demonstrate it Name of Simple Machine: Inclined Plane (1 mark) Total of 2 marks for this question

  5. Question 3 In the spaces provided, please draw each of the three classes of levers. Please use a letter “E” to indicate where you put in the effort and an “” to indicate which way that effort is being exerted. Also, use a simple triangle for the fulcrum and a box with the letter “L” in it to indicate where the load is located. Class 2 Lever Class 1 Lever Class 3 Lever • Total of 3 marks for this question

  6. Question 4 • Class 1 (1 mark) • or • Teeter Totter • Scissors • Crow Bar • Class 2 (1 mark) • or • Dump Truck • Class 3 (1 mark) • or • Hockey Stick • Human Arm • Front Loader • Catapult • Diving Board For each class of lever in the previous question, please provide a “real-life” example of each lever in the space provided. (i.e. an example of a class one lever would be a car jack… don’t try to use this example as an answer on your test) • Total of 3 marks… 1 mark for each

  7. Questions 5 If you have been given a 20˚ wedge to cut a block of wood, but instead of splitting the block of wood, the wedge simply drives in deeper and deeper. What could you change to help split the wood? What would you change: Increase the angle/width of the wedge (1 mark) How would that help: That would convert more downward force into outward force (1 mark) to help split the log Total of 2 marks for this question so far

  8. Narrow Wedge = more downward force and less outward force Wider Wedge = Less downward force and more outward force Questions 5 Total of 4 marks for this question Diagram: 1 Mark for showing the differences in downward force and 1 mark for showing the differences in outward forces

  9. 1 mark having no more than two pulleys… if they have extra pulley, they lose this mark Questions 6Total of 5 marks for this question At what point of your set up is the force reduced and by how much? Once you attach a pulley to the crate (1mark) your input force will be reduced by ½ (1 mark) 1 Mark for having one pulley attached to the crate Diagram: 1 Mark for the system being able to lift the create up to the window

  10. Questions 7 As we lengthen the lever or move the fulcrum closer to the load(1 mark) Our input force will be reduced(1 mark) The longer the lever we use (1 mark) the longer the distance we will have to push/apply our force (1 mark) LEVER Explain what the “TRADE OFFS” or “ADVANTAGES & DISADVANTAGES” are for each of the simple machines mentioned below. MachineAdvantagesDisadvantages Total of 4 marks for this question so far…

  11. Questions 7 For every movable pulley attached to the load (1 mark) Our input force will be reduced by ½ (1 mark) The more movable pulleys you use (1 mark) the longer you will have to pull on the rope to lift the object (1 mark) Pulley Explain what the “TRADE OFFS” or “ADVANTAGES & DISADVANTAGES” are for each of the simple machines mentioned below. MachineAdvantagesDisadvantages Total of 8 marks for this question so far…

  12. Questions 7 As you lengthen the Ramp or reduce the angle of the ramp (1 mark) you reduce the input force need to push the object up the ramp (1 mark) The longer the ramp (1 mark) the longer the distance you will need to push the object (1 mark) RAMP Explain what the “TRADE OFFS” or “ADVANTAGES & DISADVANTAGES” are for each of the simple machines mentioned below. MachineAdvantagesDisadvantages Total of 12 marks for this question

  13. Question 8 Total of 3 marks for this question Ramp Experiment Pulley Experiment Look at the graphs that each lab produced in the lab experiments we completed. Which graph belonged to which experiment? Lever Experiment

  14. a) Look at the graph shown below. Is there a pattern tot his data… if so, what is it? Note – Be very specific in your answer Question 9

  15. Question 9 a) • What is the pattern? Each time we increase the distance between the 1 kg mass and the fulcrum by 5 cm, (1 mark) we Triple (1 mark) the force needed to suspend the 600 g weight (1 mark)

  16. Make a prediction as to what you think the next values will be based on the data that you see in the graph. What will the value be for the following observations? • If the distance between the fulcrum and the mass is 30 cm 243 N • If the distance between the fulcrum and the mass is 35 cm 729 N • If the distance between the fulcrum and the mass is 40 cm 2187 N • Total of 3 marks for this question Question 9 b)

  17. Look at the graph shown below. Is there a pattern to this data… if so, what is it? Note – Be very specific in your answer Question 10 (a

  18. Question 10 a) • What is the pattern? Each time we increase the the amount of oil by 10 ml, (1 mark) the temperature of the pulley system (1 mark) down by 4 ˚C (1 mark)

  19. Make a prediction as to what you think the next value will be based on the data that you see in the graph. What will the value be for the following observations? • If 80 ml of oil is added the temperature will be… 12 °C • If 90 ml of oil is added the temperature will be… 8°C • If 95 ml of oil is added the temperature will be… 6°C • If only 5 ml of oil is added the temperature will be… 42 °C • Total of 4 marks for this question Question 10 b)

  20. The total for this worksheet is /52

  21. Total up the marks & write it down at the top of the front page along with the %… Please add these marks into your marks record Sheet Make sure you come in for extra help if you had troubles on this quiz Make sure that you guys are studying for these quizzes and using a cheat sheet… it will pay off!!

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