Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 54 · 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) zero (b) the same (c) about half (d) double
2. 2.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
3. 3.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) True (b) False
5. 5.⚙️ Which of these uses a pulley? (a) a crowbar (b) a well pulley (c) a doorknob (d) a steering wheel
6. 6.True or false: a crowbar is an inclined plane. (a) False (b) True
7. 7.True or false: a slide is an inclined plane. (a) False (b) True
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a mirror (d) an empty thread reel
9. 9.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a sloping road (c) a flagpole (d) a spoon lifting a lid
10. 10.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it could fall on you (d) it gets hot
11. 11.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) a mirror (d) a pencil
12. 12.⚖️ 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) how hard we must pull (c) the lifting height (d) the same string
13. 13.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 40 cm (d) 20 cm
14. 14.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) yeast (d) an empty thread reel
15. 15.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) makes it magnetic (d) halves the weight
16. 16.⚖️ 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
17. 17.True or false: a sloping road is a wheel and axle. (a) False (b) True
18. 18.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) a battery cell (d) an empty thread reel
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the lifting height (b) number of pulleys (c) how hard we must pull
21. 21.⚖️ 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
22. 22.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
23. 23.⚖️ 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) False (b) True
24. 24.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
25. 25.True or false: a ramp is a lever. (a) True (b) False
26. 26.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
28. 28.⚖️ 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) the lifting height (d) number of pulleys
29. 29.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
30. 30.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) nail (d) rope
31. 31.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a crowbar (c) a steering wheel (d) a slide
32. 32.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) easier (d) impossible
33. 33.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
34. 34.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
35. 35.🧺 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) coins as the load (d) turmeric powder
36. 36.⚖️ 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 measure it (c) we change it
37. 37.⚖️ 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
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a pencil (c) a balloon (d) an empty thread reel
39. 39.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it can hurt your finger (d) it gets longer
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) True (b) False

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