Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 557 · 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? What do we do with “the same string”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
3. 3.True or false: a see-saw uses a pulley. (a) True (b) False
4. 4.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) double (d) the same
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a magnet (c) yeast (d) turmeric powder
6. 6.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) in a circle (c) up (d) sideways
7. 7.⚖️ 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 measure it (c) we change it
8. 8.⚙️ Which of these is a lever? (a) a crane (b) a sloping road (c) a see-saw (d) a doorknob
9. 9.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) an empty thread reel (c) a pencil (d) a small paper cup
11. 11.True or false: a bottle opener is a lever. (a) False (b) True
12. 12.⚖️ 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) how hard we must pull (c) the same cup of coins (d) number of pulleys
13. 13.True or false: a crane is an inclined plane. (a) False (b) True
14. 14.🏗️ 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
15. 15.🧺 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) string (d) turmeric powder
16. 16.🛟 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
17. 17.🛟 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
18. 18.⚙️ Which of these is a lever? (a) a slide (b) a flagpole (c) a bottle opener (d) a crane
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 of these is a lever? (a) a well pulley (b) a steering wheel (c) a flagpole (d) a spoon lifting a lid
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a battery cell (c) a mirror (d) a pencil
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) an empty thread reel (c) a pencil (d) a small paper cup
23. 23.⚙️ Which of these uses a pulley? (a) a crowbar (b) a doorknob (c) a tap handle (d) a well pulley
24. 24.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) changes pull direction (d) makes it magnetic
25. 25.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
26. 26.⚖️ 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 cup of coins
27. 27.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
28. 28.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
29. 29.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
30. 30.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 10 cm (d) 20 cm
31. 31.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) rope (d) nail
32. 32.⚖️ 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) True (b) False
33. 33.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
34. 34.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
35. 35.⚖️ 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) False (b) True
36. 36.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) an empty thread reel (c) a pencil (d) a small paper cup
38. 38.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
39. 39.⚖️ 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 keep it the same (c) we measure it
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) number of pulleys (c) the same cup of coins (d) how hard we must pull

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