Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 299 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) a magnet (d) string
2. 2.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
3. 3.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 10 cm (d) 40 cm
4. 4.True or false: a sloping road is a wheel and axle. (a) False (b) True
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a battery cell (c) coins as the load (d) turmeric powder
6. 6.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) False (b) True
8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a balloon (c) coins as the load (d) string
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the same cup of coins
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) yeast (c) a pencil (d) an empty thread reel
11. 11.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) easier (d) impossible
12. 12.True or false: a tap handle is a wheel and axle. (a) False (b) True
13. 13.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it turns blue (d) it can hurt your finger
14. 14.⚖️ 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
15. 15.⚙️ Which of these is a lever? (a) a see-saw (b) a tap handle (c) a ramp (d) a crane
16. 16.⚖️ 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) number of pulleys (d) the same string
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a pencil (c) a battery cell (d) a magnet
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) turmeric powder (c) string (d) a small paper cup
19. 19.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
20. 20.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
21. 21.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) double (d) about half
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a balloon (c) a pencil (d) string
23. 23.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
24. 24.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
25. 25.⚙️ Which of these is a lever? (a) a crane (b) a spoon lifting a lid (c) a ramp (d) a doorknob
26. 26.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) changes pull direction (d) makes it magnetic
27. 27.True or false: a spoon lifting a lid is a lever. (a) False (b) True
28. 28.⚖️ 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
29. 29.True or false: a spoon lifting a lid is a wheel and axle. (a) False (b) True
30. 30.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
31. 31.⚙️ Which of these uses a pulley? (a) a ramp (b) a bottle opener (c) a slide (d) a flagpole
32. 32.⚙️ Which simple machine is a doorknob? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) an empty thread reel (c) a mirror (d) a magnet
34. 34.🇮🇳 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
35. 35.True or false: a see-saw is a lever. (a) True (b) False
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) the lifting height (c) number of pulleys (d) the same string
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) turmeric powder (c) string (d) an empty thread reel
39. 39.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) sideways (d) down
40. 40.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it gets hot (d) it is magnetic

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