Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 164 · 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.⚖️ 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 measure it (c) we keep it the same
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a pencil (d) a balloon
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) an empty thread reel (c) a small paper cup (d) a pencil
4. 4.⚖️ 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
5. 5.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it might sing (d) it gets hot
6. 6.True or false: string is needed for the thread-reel pulley. (a) False (b) True
7. 7.True or false: a flagpole is an inclined plane. (a) False (b) True
8. 8.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
9. 9.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
10. 10.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
11. 11.⚖️ 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) the lifting height (c) number of pulleys (d) the same cup of coins
12. 12.⚙️ Which simple machine is a well pulley? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
13. 13.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it turns blue (d) it gets wet
14. 14.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) a small paper cup (c) string (d) a pencil
15. 15.⚖️ 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
16. 16.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
17. 17.🧺 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) a battery cell (d) a pencil
18. 18.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
19. 19.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) zero (d) the same
20. 20.⚖️ 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
21. 21.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) down (d) up
22. 22.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
23. 23.True or false: a crowbar is a wheel and axle. (a) False (b) True
24. 24.⚙️ Which of these is a lever? (a) a ramp (b) a crane (c) a well pulley (d) a see-saw
25. 25.True or false: a crane is a lever. (a) True (b) False
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) a balloon (d) coins as the load
27. 27.⚙️ Which simple machine is a crane? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) yeast (d) coins as the load
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we keep it the same (c) we measure it
30. 30.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 10 cm (c) 5 cm (d) 40 cm
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
32. 32.⚖️ 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
33. 33.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a steering wheel (c) a crane (d) a slide
34. 34.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) adds weight (d) changes pull direction
35. 35.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a magnet (c) a small paper cup (d) a pencil
37. 37.True or false: a well pulley is an inclined plane. (a) True (b) False
38. 38.True or false: a well pulley uses a pulley. (a) False (b) True
39. 39.⚖️ 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
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a pencil (c) turmeric powder (d) a balloon

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