Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 102 · 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.⚙️ Which simple machine is a slide? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
2. 2.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) up (c) sideways (d) in a circle
3. 3.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) an empty thread reel (d) a balloon
5. 5.True or false: a crane is a wheel and axle. (a) False (b) True
6. 6.⚖️ 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 keep it the same (c) we change it
7. 7.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 20 cm (d) 5 cm
8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) string (c) an empty thread reel (d) coins as the load
9. 9.True or false: a tap handle is a lever. (a) True (b) False
10. 10.⚖️ 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 measure it (b) we change it (c) we keep it the same
11. 11.⚖️ 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
12. 12.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) an empty thread reel (c) string (d) a pencil
14. 14.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) changes pull direction (d) halves the weight
15. 15.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
16. 16.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
17. 17.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) pulling down is easier (c) the bucket floats (d) the rope gets shorter
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a mirror (c) string (d) coins as the load
19. 19.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it gets hot (d) it is magnetic
20. 20.True or false: a crane uses a pulley. (a) True (b) False
21. 21.⚙️ Which simple machine is a crowbar? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
22. 22.True or false: a bottle opener is a wheel and axle. (a) False (b) True
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we change it (c) we measure it
24. 24.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a slide (c) a flagpole (d) a tap handle
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) True (b) False
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) string (c) an empty thread reel (d) coins as the load
27. 27.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) harder (d) impossible
28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) yeast (c) turmeric powder (d) an empty thread reel
29. 29.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
30. 30.⚙️ Which simple machine is a crane? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
31. 31.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) string (c) a small paper cup (d) an empty thread reel
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we change it (c) we keep it the same
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the same string (c) the lifting height (d) how hard we must pull
35. 35.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
36. 36.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a tap handle (c) a ramp (d) a doorknob
37. 37.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
38. 38.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a spoon lifting a lid (c) a doorknob (d) a see-saw
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) a pencil (d) a magnet
40. 40.⚖️ 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 keep it the same (c) we measure it

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