Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 65 · 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.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) yeast (c) a balloon (d) a magnet
3. 3.⚖️ 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) True (b) False
4. 4.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) a small paper cup (c) an empty thread reel (d) string
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) the same string (c) number of pulleys (d) the lifting height
7. 7.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
8. 8.⚙️ Which of these is a lever? (a) a sloping road (b) a slide (c) a crane (d) a see-saw
9. 9.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
10. 10.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
11. 11.⚖️ 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
12. 12.⚖️ 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
13. 13.True or false: a sloping road is a wheel and axle. (a) True (b) False
14. 14.True or false: a spoon lifting a lid is a lever. (a) False (b) True
15. 15.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
16. 16.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) water gets lighter (d) pulling down is easier
17. 17.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 20 cm (d) 5 cm
18. 18.⚖️ 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 keep it the same (c) we change it
19. 19.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a mirror (c) an empty thread reel (d) string
21. 21.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it gets wet (d) it turns blue
22. 22.⚖️ 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
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) an empty thread reel (d) a balloon
24. 24.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) the same (d) easier
25. 25.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) yeast (c) an empty thread reel (d) a small paper cup
27. 27.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a slide (c) a steering wheel (d) a crane
28. 28.True or false: a crane uses a pulley. (a) True (b) False
29. 29.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it is magnetic (d) it gets hot
30. 30.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) nail (c) magnet (d) battery
31. 31.⚖️ 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 same string
32. 32.True or false: a crane is an inclined plane. (a) True (b) False
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the lifting height (c) the same cup of coins (d) how hard we must pull
34. 34.⚙️ Which simple machine is a slide? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a magnet (c) a pencil (d) a small paper cup
37. 37.True or false: a see-saw is a wheel and axle. (a) False (b) True
38. 38.True or false: a tap handle is a wheel and axle. (a) True (b) False
39. 39.⚖️ 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
40. 40.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a slide (c) a spoon lifting a lid (d) a see-saw

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