Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 138 · 40 questions

What you do (Pull down, lift up): 1. Push the pencil through the thread reel; an adult holds the pencil ends level. 2. Tie the paper cup to one end of the string and lay the string over the reel. 3. Put coins in the cup and pull the other end down. 4. Feel how hard you pull; never stand under the load or wrap string round your fingers.

1. 1.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “how hard we must pull”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) a small paper cup (d) a battery cell
3. 3.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a ramp (c) a slide (d) a tap handle
4. 4.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we measure it (c) we keep it the same
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) number of pulleys (c) how hard we must pull (d) the same cup of coins
7. 7.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) sideways (c) down (d) up
8. 8.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
9. 9.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) False (b) True
11. 11.True or false: a flagpole uses a pulley. (a) False (b) True
12. 12.⚙️ Which simple machine is a see-saw? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
13. 13.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
14. 14.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) coins as the load (c) a balloon (d) an empty thread reel
15. 15.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
16. 16.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
17. 17.True or false: a tap handle is a lever. (a) False (b) True
18. 18.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
19. 19.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it might sing (d) it gets hot
20. 20.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
21. 21.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
22. 22.True or false: a bottle opener is a wheel and axle. (a) True (b) False
23. 23.⚙️ Which of these is a lever? (a) a doorknob (b) a well pulley (c) a tap handle (d) a bottle opener
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the same string
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a balloon (d) coins as the load
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the lifting height (b) how hard we must pull (c) number of pulleys
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) True (b) False
28. 28.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
29. 29.⚙️ Which of these is a lever? (a) a flagpole (b) a spoon lifting a lid (c) a tap handle (d) a well pulley
30. 30.⚙️ Which of these is a lever? (a) a see-saw (b) a flagpole (c) a well pulley (d) a tap handle
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same cup of coins”? (a) we change it (b) we measure it (c) we keep it the same
32. 32.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) a pencil (c) a small paper cup (d) string
34. 34.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets wet (c) it gets longer (d) it turns blue
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) an empty thread reel (c) yeast (d) a balloon
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) True (b) False
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the same cup of coins
38. 38.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a crane (c) a well pulley (d) a sloping road
39. 39.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we change it (c) we keep it the same

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