Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 859 · 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.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) in the tap (c) on the flagpole (d) on the bench
2. 2.⚖️ 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
3. 3.⚖️ 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 keep it the same (b) we change it (c) we measure it
4. 4.True or false: a flagpole uses a pulley. (a) True (b) False
5. 5.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
6. 6.⚖️ 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
7. 7.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
8. 8.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a tap handle (c) a ramp (d) a steering wheel
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) coins as the load (c) a pencil (d) a small paper cup
10. 10.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a crowbar (c) a flagpole (d) a bottle opener
11. 11.True or false: a tap handle uses a pulley. (a) True (b) False
12. 12.⚖️ 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 keep it the same (b) we change it (c) we measure it
13. 13.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) nail (d) rope
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
15. 15.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
16. 16.True or false: a spoon lifting a lid is a lever. (a) True (b) False
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a magnet (c) a battery cell (d) turmeric powder
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) False (b) True
19. 19.⚖️ 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 same cup of coins (c) the same string (d) number of pulleys
20. 20.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
21. 21.⚖️ 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
22. 22.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
23. 23.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) yeast (c) a battery cell (d) a mirror
25. 25.⚙️ Which of these is a lever? (a) a flagpole (b) a well pulley (c) a slide (d) a bottle opener
26. 26.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) down (c) up (d) in a circle
27. 27.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
28. 28.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it turns blue (c) it gets longer (d) it gets wet
29. 29.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) a small paper cup (c) an empty thread reel (d) coins as the load
30. 30.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) string (d) a balloon
32. 32.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) turmeric powder (d) a balloon
34. 34.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
35. 35.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
36. 36.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it could fall on you (d) it might sing
37. 37.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) changes pull direction (d) halves the weight
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) a mirror (d) a small paper cup
39. 39.⚖️ 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) False (b) True
40. 40.⚖️ 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

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