Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 771 · 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) False (b) True
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a battery cell (d) a pencil
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we change it (c) we keep it the same
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) string (d) a balloon
6. 6.⚖️ 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 keep it the same (c) we change it
7. 7.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a balloon (c) string (d) turmeric powder
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) True (b) False
9. 9.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
10. 10.True or false: a tap handle uses a pulley. (a) False (b) True
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
12. 12.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
13. 13.⚙️ Which simple machine is a crowbar? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
14. 14.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) changes pull direction (d) halves the weight
15. 15.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a steering wheel (c) a ramp (d) a crowbar
16. 16.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 5 cm (d) 40 cm
17. 17.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
18. 18.⚖️ 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 cup of coins
19. 19.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) impossible (d) harder
20. 20.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) yeast (c) a mirror (d) an empty thread reel
22. 22.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) coins as the load (c) yeast (d) a battery cell
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) the same cup of coins (c) number of pulleys (d) how hard we must pull
25. 25.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) down (d) sideways
26. 26.True or false: a sloping road is an inclined plane. (a) True (b) False
27. 27.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
28. 28.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a pencil (c) a magnet (d) a balloon
30. 30.⚙️ Which of these is a lever? (a) a sloping road (b) a steering wheel (c) a flagpole (d) a spoon lifting a lid
31. 31.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it could fall on you (c) it is magnetic (d) it might sing
32. 32.⚙️ Which simple machine is a flagpole? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
33. 33.True or false: a spoon lifting a lid is a lever. (a) True (b) False
34. 34.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
35. 35.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
36. 36.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
37. 37.True or false: a crane uses a pulley. (a) True (b) False
38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a battery cell (c) turmeric powder (d) a balloon
39. 39.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) yeast (d) a small paper cup
40. 40.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False

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