Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 634 · 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.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) a magnet (d) a pencil
3. 3.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) double (d) zero
4. 4.⚖️ 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 string
5. 5.⚖️ 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
6. 6.True or false: string is needed for the thread-reel pulley. (a) True (b) False
7. 7.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
8. 8.⚙️ Which of these is a lever? (a) a bottle opener (b) a tap handle (c) a slide (d) a doorknob
9. 9.⚖️ 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
10. 10.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) string (c) a pencil (d) coins as the load
11. 11.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) yeast (d) coins as the load
13. 13.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the bench (c) on the flagpole (d) on the blackboard
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
15. 15.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) a balloon (d) coins as the load
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) coins as the load (d) turmeric powder
18. 18.True or false: a tap handle is a wheel and axle. (a) False (b) True
19. 19.⚖️ 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) False (b) True
20. 20.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
21. 21.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
22. 22.⚖️ 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 string (c) the lifting height (d) the same cup of coins
23. 23.True or false: a bottle opener is a lever. (a) False (b) True
24. 24.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it gets hot (d) it might sing
25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) turmeric powder (c) a balloon (d) coins as the load
26. 26.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a bottle opener (c) a spoon lifting a lid (d) a well pulley
27. 27.⚖️ 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
28. 28.True or false: a spoon lifting a lid is a lever. (a) False (b) True
29. 29.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
30. 30.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 40 cm (d) 20 cm
31. 31.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
32. 32.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
33. 33.⚖️ 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) number of pulleys (c) the same cup of coins (d) the lifting height
34. 34.⚖️ 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
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) a small paper cup (d) a mirror
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a battery cell (c) a pencil (d) a small paper cup
37. 37.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
38. 38.⚖️ 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
39. 39.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) down (d) in a circle
40. 40.⚖️ 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 measure it (b) we keep it the same (c) we change it

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