Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 296 · 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 of these is needed for the thread-reel pulley? (a) an empty thread reel (b) turmeric powder (c) a magnet (d) a battery cell
2. 2.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) up (c) in a circle (d) sideways
3. 3.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
4. 4.🏗️ 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
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) string (d) a battery cell
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
7. 7.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a slide (c) a doorknob (d) a flagpole
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) turmeric powder (c) a magnet (d) string
9. 9.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
10. 10.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) True (b) False
12. 12.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it might sing (d) it could fall on you
13. 13.True or false: string is needed for the thread-reel pulley. (a) True (b) False
14. 14.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it turns blue (d) it can hurt your finger
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) False (b) True
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) a magnet (d) a small paper cup
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull
18. 18.⚖️ 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 measure it (c) we change it
19. 19.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) halves the weight (d) changes pull direction
20. 20.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
21. 21.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) about half (d) zero
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) a small paper cup (c) an empty thread reel (d) string
23. 23.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a battery cell (c) string (d) a pencil
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.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) a magnet (d) a pencil
27. 27.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) a magnet (d) coins as the load
29. 29.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
30. 30.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
31. 31.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) string (c) a small paper cup (d) an empty thread reel
33. 33.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
34. 34.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) an empty thread reel (c) a small paper cup (d) coins as the load
36. 36.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we change it (c) we measure it
38. 38.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
39. 39.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) a mirror (d) a pencil
40. 40.⚖️ 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) False (b) True

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