Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 214 · 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.🏗️ 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
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
3. 3.True or false: a crane is a wheel and axle. (a) False (b) True
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) turmeric powder (d) coins as the load
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) string (c) coins as the load (d) a pencil
6. 6.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) nail (d) rope
7. 7.⚖️ 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) the same cup of coins (c) how hard we must pull
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we change it (c) we measure it
9. 9.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
10. 10.⚖️ 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) the same string (c) how hard we must pull
11. 11.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) easier (d) impossible
12. 12.True or false: a steering wheel is a wheel and axle. (a) False (b) True
13. 13.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it could fall on you (d) it might sing
14. 14.True or false: a flagpole is an inclined plane. (a) False (b) True
15. 15.⚖️ 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 keep it the same (b) we measure it (c) we change it
16. 16.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 10 cm (d) 40 cm
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) a magnet (d) coins as the load
18. 18.⚙️ Which simple machine is a see-saw? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a balloon (c) coins as the load (d) a pencil
20. 20.True or false: a see-saw is a lever. (a) False (b) True
21. 21.⚖️ 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) False (b) True
22. 22.🧺 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) an empty thread reel (d) a balloon
23. 23.⚖️ 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 keep it the same (c) we change it
24. 24.⚙️ Which simple machine is a slide? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
25. 25.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
26. 26.⚖️ 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) how hard we must pull (c) number of pulleys (d) the same string
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a battery cell (c) an empty thread reel (d) string
28. 28.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a steering wheel (c) a see-saw (d) a well pulley
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 measure it (b) we change it (c) we keep it the same
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) True (b) False
31. 31.🧺 Do we need string 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? True or false: the same string is kept the same. (a) False (b) True
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a balloon (c) a mirror (d) a battery cell
34. 34.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) pulling down is easier (d) the rope gets shorter
35. 35.⚙️ Which of these is a lever? (a) a flagpole (b) a well pulley (c) a crowbar (d) a crane
36. 36.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets wet (c) it gets longer (d) it turns blue
37. 37.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
38. 38.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) yeast (c) an empty thread reel (d) a balloon
40. 40.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed

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