Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 411 · 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.True or false: a see-saw is a wheel and axle. (a) False (b) True
2. 2.⚖️ 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
3. 3.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) adds weight (d) changes pull direction
4. 4.⚙️ Which simple machine is a tap handle? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
5. 5.⚙️ Which of these is a lever? (a) a tap handle (b) a see-saw (c) a slide (d) a doorknob
6. 6.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
7. 7.⚖️ 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
8. 8.True or false: a spoon lifting a lid is a lever. (a) False (b) True
9. 9.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a see-saw (c) a tap handle (d) a well pulley
10. 10.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
11. 11.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) the same string (c) number of pulleys (d) how hard we must pull
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
14. 14.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
15. 15.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) how hard we must pull (c) the same string (d) the same cup of coins
17. 17.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
19. 19.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 40 cm (d) 20 cm
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) turmeric powder (d) an empty thread reel
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
22. 22.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a mirror (c) turmeric powder (d) a small paper cup
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) coins as the load (d) a mirror
24. 24.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
25. 25.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it is magnetic (d) it gets hot
26. 26.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
27. 27.⚖️ 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 keep it the same (c) we change it
28. 28.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) a pencil (c) string (d) a small paper cup
29. 29.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) yeast (c) a pencil (d) string
30. 30.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) magnet (c) nail (d) battery
31. 31.⚙️ Which of these is a lever? (a) a sloping road (b) a steering wheel (c) a well pulley (d) a crowbar
32. 32.True or false: string is needed for the thread-reel pulley. (a) True (b) False
33. 33.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
34. 34.⚖️ 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 keep it the same (b) we measure it (c) we change it
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) a battery cell (d) turmeric powder
36. 36.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
37. 37.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) True (b) False
40. 40.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley

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