Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 408 · 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.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
2. 2.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) adds weight (c) makes it magnetic (d) halves the weight
3. 3.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
4. 4.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it is magnetic (d) it could fall on you
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we measure it (c) we change it
6. 6.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
7. 7.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
8. 8.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) the same (d) double
9. 9.⚖️ 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 keep it the same (b) we measure it (c) we change it
10. 10.⚖️ 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 measure it (b) we change it (c) we keep it the same
11. 11.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) string (c) a small paper cup (d) an empty thread reel
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) a battery cell (d) coins as the load
14. 14.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
15. 15.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
16. 16.⚖️ 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 cup of coins
17. 17.True or false: a crane uses a pulley. (a) False (b) True
18. 18.⚖️ 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
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) number of pulleys (c) the lifting height (d) the same string
20. 20.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a small paper cup (c) a balloon (d) string
21. 21.⚖️ 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 change it (c) we keep it the same
22. 22.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets longer (d) it gets wet
23. 23.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
24. 24.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
25. 25.⚙️ Which of these uses a pulley? (a) a well pulley (b) a doorknob (c) a see-saw (d) a slide
26. 26.True or false: a doorknob is a lever. (a) False (b) True
27. 27.⚖️ 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) False (b) True
28. 28.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
29. 29.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
30. 30.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) nail (d) magnet
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) string (c) turmeric powder (d) a balloon
32. 32.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a see-saw (c) a sloping road (d) a spoon lifting a lid
33. 33.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a ramp (c) a crowbar (d) a crane
34. 34.⚙️ Which of these is a lever? (a) a slide (b) a flagpole (c) a spoon lifting a lid (d) a well pulley
35. 35.True or false: a bottle opener uses a pulley. (a) False (b) True
36. 36.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) down (c) up (d) in a circle
37. 37.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
38. 38.⚙️ Which simple machine is a doorknob? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
39. 39.⚖️ 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 string
40. 40.🔮 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

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