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Instructions for using this template.

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Presentation on theme: "Instructions for using this template."— Presentation transcript:

1 Instructions for using this template.
Remember this is Jeopardy, so where I have written “Answer” this is the prompt the students will see, and where I have “Question” should be the student’s response. To enter your questions and answers, click once on the text on the slide, then highlight and just type over what’s there to replace it. If you hit Delete or Backspace, it sometimes makes the text box disappear. When clicking on the slide to move to the next appropriate slide, be sure you see the hand, not the arrow. (If you put your cursor over a text box, it will be an arrow and WILL NOT take you to the right location.)

2 You will be given the answer. You must give the correct question.
Jeopardy Choose a category. You will be given the answer. You must give the correct question. Click to begin.

3 Click here for Final Jeopardy
Choose a point value. Choose a point value. Click here for Final Jeopardy

4 WORK & POWER LEVERS Wheel/Axel & Screw Pulleys Wedge & Incline Plane 10 Point 10 Point 10 Point 10 Point 10 Point 20 Points 20 Points 20 Points 20 Points 20 Points 30 Points 30 Points 30 Points 30 Points 30 Points 40 Points 40 Points 40 Points 40 Points 40 Points 50 Points 50 Points 50 Points 50 Points 50 Points

5 What is the unit for work?

6 Joules (J)

7 One morning Ms. Mannix was carrying a heavy bucket of water to the turtle tank, how much work was she doing?

8 NONE 

9 Pushing a child on a swing
Work or No work? Pushing a child on a swing

10 Work

11 The power of a light bulb that converts electrical energy at a rate of 200 J/s is…

12 200 Watts 200J / 1 second

13 Which action represents more work?
Lifting 80N box 1 m Lifting a 160N box 1 m Lifting a 90N box 2 m Lifting a 100N box 1.5 m

14 C. Lifting a 90N box 2 m

15 Most of the machines in your body consist of bones and muscles and are called…

16 Levers, silly that is what section we are in!

17 Scissors represent what type of lever? Draw a picture for justification

18 1st class

19 Which type of lever increases distance but does not change the direction of the input force?

20 3rd class

21 Define a fulcrum?

22 The fixed point that a lever pivots around

23 Which of the following is an example of a 3rd class lever?
Scissors Pliers Fishing pole Nutcracker

24 Fishing Pole

25 Fill in the statement below: Vocab term
The mechanical advantage of a machine is the number of times a machine increases __________________________________________.

26 The force exerted on the machine

27 What is the formula for ideal mechanical advantage of a wheel and axle?

28 Radius of wheel Radius of axle

29 A 1 cm long screw that is 62.5% efficient in pulling a 500 N board to a wall when the carpenter used 80 N of force in turning it. What is the thread length of the screw?

30 10 cm

31 Jack & Jill went up the hill to fetch a pail of water
Jack & Jill went up the hill to fetch a pail of water. At the well, Jill used a force of 20.0 N to turn the crank handle of radius m to rotate the axle of radius m, so she could raise the 60.0 N bucket of water. What is the ideal mechanical advantage of the wheel? What is the efficiency of the wheel?

32 IMA: 4 Efficiency: 75%

33 A screw has the greatest MA when it has a….
Think about distance of threads (close together or far apart) Spiral length (long or short)

34 Long spirals and close threads

35 If a movable pulley is required to lift a block that
weighs 500 Newton what would the Input force be?

36 250 Newtons (N)

37 What type of pulley is represented in the below picture?

38 Compound, 3 string, Or block and tackle

39 You apply 100 N to a machine and the machine applies 1000 N to an object. What is the MA?

40 10

41 A crate of bananas weighing 3000N is shipped from South Africa to New York, where it is unloaded by a dock worker who lifts the crate by pulling with a force of 200N on the rope of a pulley. What is the actual mechanical advantage of the system?

42 15

43 Cathy, a 460N actress playing Peter Pan, is hoisted above the stage in order to “fly” by a stagehand pulling on a pulley system with a force of 60N. What is the efficiency of the machine?

44 767%

45 What is the formula for the IMA of an inclined plane

46 Length of the incline Height of the incline

47 What is the formula for IMA of a wedge?

48 Length of wedge Width of wedge

49 A zipper is made from 3 inclined planes or wedges?

50 Wedges

51 Which body parts are shaped like wedges?
incisors (teeth) tendons bones Muscles

52 Incisors (teeth)

53 Two clowns, of mass 50. 0 Kg and 70
Two clowns, of mass 50.0 Kg and 70.0 Kg respectively, are in a circus act performing a stunt with a trampoline and a seesaw. The smaller clown stands on the lower end of the seesaw while the larger clown jumps from the trampoline onto the raised side of the seesaw, propelling his friend into the air. A) What is the ideal mechanical advantage of the seesaw? B) If the larger clown exerts a force of 850 N on the seesaw as he jumps, how much force is exerted on the smaller clown?

54 IMA: 0.71 Output force: .06N

55 Final Jeopardy Make your wager

56 Final Answer

57 Final Question


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