Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 895 · 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 needed for the thread-reel pulley. (a) False (b) True
2. 2.⚖️ 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) False (b) True
3. 3.True or false: a doorknob is a lever. (a) True (b) False
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a battery cell (c) coins as the load (d) string
5. 5.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a flagpole (c) a slide (d) a doorknob
6. 6.⚖️ 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 change it (b) we measure it (c) we keep it the same
7. 7.🛟 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
8. 8.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
9. 9.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
10. 10.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
11. 11.True or false: a bottle opener is a wheel and axle. (a) False (b) True
12. 12.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it gets wet (d) it turns blue
13. 13.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) string (d) a mirror
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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) a pencil (c) coins as the load (d) string
17. 17.True or false: a well pulley is a wheel and axle. (a) False (b) True
18. 18.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
19. 19.⚙️ Which of these is an inclined plane? (a) a ramp (b) a see-saw (c) a bottle opener (d) a crowbar
20. 20.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
22. 22.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
23. 23.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
24. 24.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
25. 25.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) impossible (d) harder
26. 26.🔮 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
27. 27.⚙️ Which of these is an inclined plane? (a) a slide (b) a crowbar (c) a steering wheel (d) a crane
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) yeast (c) string (d) a pencil
29. 29.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) coins as the load (c) a mirror (d) a magnet
31. 31.⚖️ 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 change it (c) we measure it
32. 32.⚖️ 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
33. 33.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) double (d) zero
34. 34.⚖️ 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
35. 35.⚖️ 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 string (b) number of pulleys (c) the same cup of coins (d) the lifting height
36. 36.⚖️ 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) the same string (c) number of pulleys (d) how hard we must pull
37. 37.⚖️ 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
38. 38.True or false: a crane uses a pulley. (a) True (b) False
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) string (d) a balloon
40. 40.⚖️ 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 lifting height

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