Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 516 · 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.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
2. 2.⚙️ Which of these is a lever? (a) a flagpole (b) a sloping road (c) a steering wheel (d) a crowbar
3. 3.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) zero (d) about half
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a magnet (c) a small paper cup (d) a mirror
5. 5.⚙️ Which of these is a lever? (a) a bottle opener (b) a slide (c) a steering wheel (d) a sloping road
6. 6.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
7. 7.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
8. 8.⚙️ Which of these is an inclined plane? (a) a ramp (b) a bottle opener (c) a see-saw (d) a crane
9. 9.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
10. 10.True or false: string is needed for the thread-reel pulley. (a) False (b) True
11. 11.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
12. 12.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
13. 13.⚙️ Which simple machine is a doorknob? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
14. 14.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
15. 15.⚖️ 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 measure it (c) we keep it the same
16. 16.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) nail (c) rope (d) battery
17. 17.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) makes it magnetic (d) halves the weight
18. 18.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 10 cm (c) 5 cm (d) 40 cm
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) a pencil (d) yeast
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) number of pulleys (c) the lifting height (d) how hard we must pull
21. 21.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) yeast (d) an empty thread reel
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) coins as the load (c) an empty thread reel (d) a small paper cup
24. 24.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
25. 25.True or false: a see-saw is a lever. (a) False (b) True
26. 26.True or false: a spoon lifting a lid is a lever. (a) False (b) True
27. 27.True or false: a flagpole is a wheel and axle. (a) True (b) False
28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a mirror (c) a battery cell (d) turmeric powder
29. 29.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
30. 30.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it is magnetic (d) it gets hot
31. 31.⚖️ 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) how hard we must pull (c) the same cup of coins
32. 32.True or false: a bottle opener is a lever. (a) True (b) False
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) a magnet (d) coins as the load
34. 34.True or false: a flagpole is a lever. (a) False (b) True
35. 35.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a battery cell (c) coins as the load (d) a pencil
37. 37.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets wet (d) it gets longer
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we measure it (c) we keep it the same
39. 39.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
40. 40.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True

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