Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 55 · 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 a small paper cup for the thread-reel pulley? (a) not needed (b) needed
2. 2.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) string (c) coins as the load (d) a pencil
4. 4.⚖️ 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) how hard we must pull (c) number of pulleys
5. 5.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
6. 6.⚖️ 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 keep it the same (c) we measure it
7. 7.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) sideways (c) in a circle (d) up
8. 8.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
9. 9.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 20 cm (d) 5 cm
10. 10.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
11. 11.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) halves the weight (c) changes pull direction (d) adds weight
12. 12.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it gets hot (d) it could fall on you
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) a pencil (c) an empty thread reel (d) a small paper cup
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a magnet (d) a pencil
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a balloon (c) string (d) a magnet
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a balloon (c) a small paper cup (d) a battery cell
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) a pencil (d) turmeric powder
18. 18.⚙️ Which of these uses a pulley? (a) a see-saw (b) a crane (c) a steering wheel (d) a crowbar
19. 19.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
20. 20.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
21. 21.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
22. 22.⚖️ 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 keep it the same (c) we change it
23. 23.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) turmeric powder (c) a small paper cup (d) coins as the load
25. 25.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
26. 26.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
27. 27.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) harder (d) the same
28. 28.⚖️ 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) the lifting height (c) number of pulleys (d) the same cup of coins
29. 29.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) number of pulleys (c) the lifting height (d) the same cup of coins
31. 31.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it can hurt your finger (d) it gets wet
32. 32.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a tap handle (c) a well pulley (d) a sloping road
33. 33.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
34. 34.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) battery (c) magnet (d) rope
35. 35.⚖️ 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
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
37. 37.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) a small paper cup (c) an empty thread reel (d) coins as the load
39. 39.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
40. 40.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a slide (c) a tap handle (d) a crane

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