Pulley STEM Project Worksheet

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

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