Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 107 · 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? True or false: the lifting height is kept the same. (a) True (b) False
2. 2.True or false: a flagpole uses a pulley. (a) True (b) False
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) the same string (c) number of pulleys (d) the same cup of coins
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) a battery cell (d) coins as the load
5. 5.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
6. 6.True or false: a tap handle is a wheel and axle. (a) True (b) False
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a battery cell (c) a small paper cup (d) string
8. 8.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
9. 9.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) double (d) zero
10. 10.⚖️ 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
11. 11.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
12. 12.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the bucket floats (c) the rope gets shorter (d) water gets lighter
13. 13.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
14. 14.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
15. 15.⚖️ 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) how hard we must pull (c) number of pulleys
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a balloon (c) string (d) an empty thread reel
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) how hard we must pull (c) the same cup of coins (d) the lifting height
18. 18.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it can hurt your finger (d) it gets longer
19. 19.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
20. 20.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
21. 21.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
22. 22.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) in a circle (d) down
23. 23.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
24. 24.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
25. 25.⚖️ 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) True (b) False
26. 26.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
27. 27.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
28. 28.🧺 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 magnet
29. 29.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
30. 30.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) adds weight (d) changes pull direction
31. 31.⚙️ Which of these is an inclined plane? (a) a crane (b) a steering wheel (c) a see-saw (d) a slide
32. 32.⚖️ 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) True (b) False
33. 33.True or false: a spoon lifting a lid is a wheel and axle. (a) True (b) False
34. 34.True or false: string is needed for the thread-reel pulley. (a) False (b) True
35. 35.🧺 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 mirror (d) string
36. 36.⚖️ 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
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) coins as the load (c) a small paper cup (d) an empty thread reel
38. 38.⚖️ 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 keep it the same (b) we change it (c) we measure it
39. 39.⚖️ 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) True (b) False
40. 40.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a bottle opener (c) a see-saw (d) a doorknob

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