Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 571 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) an empty thread reel (d) a magnet
2. 2.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) up (d) down
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) an empty thread reel (d) a balloon
4. 4.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it gets wet (d) it turns blue
5. 5.⚙️ Which simple machine is a sloping road? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) yeast (c) an empty thread reel (d) a small paper cup
7. 7.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
9. 9.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
10. 10.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) string (c) an empty thread reel (d) a small paper cup
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) an empty thread reel (d) a mirror
12. 12.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
13. 13.⚖️ 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
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
15. 15.⚖️ 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) how hard we must pull (c) the same cup of coins (d) the same string
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) the same cup of coins (b) the lifting height (c) number of pulleys (d) the same string
17. 17.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) halves the weight (d) adds weight
18. 18.⚖️ 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
19. 19.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 5 cm (c) 10 cm (d) 20 cm
20. 20.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
21. 21.⚖️ 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
22. 22.⚙️ Which of these is a lever? (a) a well pulley (b) a ramp (c) a flagpole (d) a bottle opener
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) how hard we must pull (c) the same cup of coins
24. 24.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
25. 25.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) turmeric powder (c) an empty thread reel (d) a small paper cup
27. 27.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a spoon lifting a lid (c) a ramp (d) a bottle opener
28. 28.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
29. 29.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
30. 30.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
31. 31.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
32. 32.⚖️ 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
33. 33.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
34. 34.True or false: a crowbar is a lever. (a) True (b) False
35. 35.🧺 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) string (d) a battery cell
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) turmeric powder (c) yeast (d) a balloon
37. 37.⚙️ Which of these is a lever? (a) a slide (b) a spoon lifting a lid (c) a well pulley (d) a steering wheel
38. 38.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it is magnetic (d) it could fall on you
39. 39.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) how hard we must pull (c) the lifting height

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