Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 570 · 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: the same cup of coins is kept the same. (a) True (b) False
2. 2.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) halves the weight (d) changes pull direction
3. 3.True or false: a doorknob uses a pulley. (a) False (b) True
4. 4.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) sideways (c) up (d) down
5. 5.⚖️ 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
6. 6.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
7. 7.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) harder (d) impossible
8. 8.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
9. 9.True or false: a see-saw uses a pulley. (a) False (b) True
10. 10.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) battery (c) rope (d) magnet
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a pencil (c) a battery cell (d) a balloon
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we measure it (c) we keep it the same
13. 13.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) double (d) the same
14. 14.True or false: string is needed for the thread-reel pulley. (a) False (b) True
15. 15.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
16. 16.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
17. 17.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
18. 18.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it gets longer (d) it turns blue
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) a small paper cup (d) turmeric powder
20. 20.⚖️ 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
21. 21.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it is magnetic (d) it gets hot
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a balloon (c) a small paper cup (d) an empty thread reel
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) a battery cell (d) coins as the load
24. 24.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
25. 25.True or false: a crowbar is a lever. (a) True (b) False
26. 26.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
27. 27.⚙️ Which of these uses a pulley? (a) a ramp (b) a slide (c) a bottle opener (d) a flagpole
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) the same cup of coins (c) how hard we must pull (d) number of pulleys
29. 29.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
30. 30.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) pulling down is easier (d) water gets lighter
31. 31.⚖️ 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
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.⚖️ 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
34. 34.⚖️ 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 change it (c) we keep it the same
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a small paper cup (c) a battery cell (d) turmeric powder
36. 36.⚙️ Which of these is a lever? (a) a bottle opener (b) a doorknob (c) a crane (d) a ramp
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) coins as the load (c) string (d) a pencil
38. 38.True or false: a bottle opener is a wheel and axle. (a) False (b) True
39. 39.⚖️ 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
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) coins as the load (c) a magnet (d) a balloon

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