Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 807 · 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 magnet is needed for the thread-reel pulley. (a) True (b) False
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 keep it the same (c) we change it
3. 3.⚖️ 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
4. 4.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
5. 5.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) yeast (c) string (d) coins as the load
7. 7.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) a small paper cup (d) a mirror
8. 8.⚙️ Which of these is a lever? (a) a slide (b) a crowbar (c) a well pulley (d) a crane
9. 9.True or false: a tap handle uses a pulley. (a) True (b) False
10. 10.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) string (c) a balloon (d) turmeric powder
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a small paper cup (c) a battery cell (d) string
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) a small paper cup (c) an empty thread reel (d) a pencil
13. 13.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) string (d) a magnet
15. 15.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it can hurt your finger (d) it gets longer
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) an empty thread reel (d) a balloon
17. 17.⚖️ 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) the same string (c) number of pulleys (d) how hard we must pull
18. 18.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it could fall on you (c) it is magnetic (d) it might sing
19. 19.⚖️ 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) the lifting height (c) how hard we must pull (d) the same cup of coins
20. 20.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
21. 21.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
22. 22.⚖️ 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) False (b) True
23. 23.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
24. 24.True or false: a crane is a wheel and axle. (a) False (b) True
25. 25.⚖️ 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) False (b) True
26. 26.True or false: a spoon lifting a lid is a lever. (a) False (b) True
27. 27.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
28. 28.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a steering wheel (c) a slide (d) a crane
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we keep it the same (c) we measure it
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) False (b) True
31. 31.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
32. 32.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
33. 33.⚙️ Which of these is a wheel and axle? (a) a slide (b) a crowbar (c) a tap handle (d) a crane
34. 34.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
35. 35.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) about half (d) double
36. 36.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) water gets lighter (c) the rope gets shorter (d) the bucket floats
37. 37.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
38. 38.⚙️ Which simple machine is a crane? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
39. 39.⚖️ 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 lifting height
40. 40.⚖️ 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 keep it the same (c) we change it

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