Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 828 · 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.🛟 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
2. 2.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a bottle opener (c) a slide (d) a spoon lifting a lid
3. 3.⚖️ 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) how hard we must pull (c) number of pulleys (d) the lifting height
4. 4.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) a mirror (d) a small paper cup
6. 6.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
7. 7.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a magnet (c) coins as the load (d) a balloon
9. 9.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a well pulley (c) a tap handle (d) a bottle opener
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) a small paper cup (d) a balloon
12. 12.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
13. 13.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 10 cm (d) 40 cm
14. 14.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
15. 15.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) down (d) up
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we measure it (c) we keep it the same
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) True (b) False
18. 18.⚖️ 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) the same cup of coins (c) number of pulleys
19. 19.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
21. 21.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
22. 22.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
23. 23.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a balloon (d) coins as the load
25. 25.⚖️ 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 change it (c) we measure it
26. 26.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) impossible (d) the same
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) string (d) a magnet
28. 28.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
29. 29.⚙️ Which of these is a lever? (a) a ramp (b) a crowbar (c) a flagpole (d) a doorknob
30. 30.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
31. 31.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) rope (d) nail
32. 32.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) an empty thread reel (d) turmeric powder
34. 34.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a ramp (c) a see-saw (d) a well pulley
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) turmeric powder (c) an empty thread reel (d) string
36. 36.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
37. 37.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) the bucket floats (c) water gets lighter (d) pulling down is easier
38. 38.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
39. 39.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
40. 40.⚙️ Which of these is a lever? (a) a sloping road (b) a ramp (c) a bottle opener (d) a flagpole

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