Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 905 · 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: number of pulleys is kept the same. (a) True (b) False
2. 2.True or false: a bottle opener is a lever. (a) True (b) False
3. 3.🛟 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
4. 4.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
5. 5.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
6. 6.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
7. 7.⚖️ 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) number of pulleys (d) the same cup of coins
8. 8.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
9. 9.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) about half (d) the same
10. 10.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) harder (d) easier
11. 11.True or false: a well pulley is a lever. (a) True (b) False
12. 12.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
13. 13.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) a balloon (d) string
15. 15.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 10 cm (d) 5 cm
16. 16.True or false: a see-saw is an inclined plane. (a) True (b) False
17. 17.⚙️ Which of these is an inclined plane? (a) a ramp (b) a spoon lifting a lid (c) a tap handle (d) a steering wheel
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
19. 19.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
20. 20.⚖️ 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 measure it (c) we change it
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) turmeric powder (d) coins as the load
22. 22.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) yeast (c) a pencil (d) a battery cell
23. 23.⚖️ 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 measure it (b) we change it (c) we keep it the same
24. 24.True or false: a steering wheel is a lever. (a) True (b) False
25. 25.🏗️ 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
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a balloon (c) a battery cell (d) string
27. 27.🛟 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
28. 28.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
29. 29.⚖️ 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) the same cup of coins (d) number of pulleys
30. 30.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) a small paper cup (c) an empty thread reel (d) string
31. 31.⚖️ 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 measure it (c) we keep it the same
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) True (b) False
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) yeast (d) a pencil
34. 34.⚖️ 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
35. 35.True or false: a crowbar is a lever. (a) False (b) True
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 change it (b) we keep it the same (c) we measure it
37. 37.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) zero (d) the same
38. 38.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) makes it magnetic (d) changes pull direction
39. 39.⚙️ Which of these is a lever? (a) a doorknob (b) a crane (c) a slide (d) a crowbar
40. 40.⚖️ 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) True (b) False

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