Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 940 · 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 the one thing we change. (a) True (b) False
2. 2.⚖️ 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
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 measure it (c) we change it
4. 4.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the blackboard (c) on the bench (d) in the tap
5. 5.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a slide (c) a flagpole (d) a bottle opener
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) string (d) a mirror
7. 7.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
8. 8.⚖️ 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) True (b) False
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) a battery cell (d) an empty thread reel
10. 10.⚖️ 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
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a magnet (d) a small paper cup
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a small paper cup (c) an empty thread reel (d) turmeric powder
13. 13.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it gets hot (d) it might sing
14. 14.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) the same cup of coins (c) how hard we must pull (d) the same string
16. 16.⚖️ 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 measure it (c) we change it
17. 17.True or false: a slide is a lever. (a) True (b) False
18. 18.⚖️ 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) the same cup of coins (c) number of pulleys (d) how hard we must pull
19. 19.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
20. 20.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a ramp (c) a sloping road (d) a bottle opener
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we keep it the same (c) we change it
22. 22.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
23. 23.True or false: a sloping road is an inclined plane. (a) True (b) False
24. 24.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a magnet (c) an empty thread reel (d) a balloon
26. 26.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
27. 27.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 20 cm (d) 10 cm
28. 28.⚙️ Which of these is a lever? (a) a see-saw (b) a flagpole (c) a slide (d) a steering wheel
29. 29.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) makes it magnetic (d) changes pull direction
30. 30.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
31. 31.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) an empty thread reel (c) a small paper cup (d) string
33. 33.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) magnet (c) battery (d) rope
34. 34.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) yeast (c) a mirror (d) a balloon
37. 37.⚙️ Which simple machine is a see-saw? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) a small paper cup (c) an empty thread reel (d) a pencil
39. 39.⚖️ 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
40. 40.⚖️ 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) False (b) True

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