Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 952 · 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: a see-saw is a lever. (a) True (b) False
2. 2.⚖️ 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 change it (b) we measure it (c) we keep it the same
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) string (c) a small paper cup (d) an empty thread reel
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) coins as the load (c) string (d) turmeric powder
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) False (b) True
6. 6.🧺 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 magnet
7. 7.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a tap handle (c) a steering wheel (d) a slide
8. 8.⚖️ 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 change it (b) we measure it (c) we keep it the same
9. 9.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a crane (c) a ramp (d) a doorknob
10. 10.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the same string (c) how hard we must pull (d) the same cup of coins
12. 12.⚖️ 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
13. 13.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
14. 14.⚙️ Which of these is an inclined plane? (a) a slide (b) a tap handle (c) a doorknob (d) a bottle opener
15. 15.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
16. 16.True or false: a flagpole is a wheel and axle. (a) True (b) False
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) a mirror (d) coins as the load
18. 18.True or false: a bottle opener uses a pulley. (a) True (b) False
19. 19.🔮 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
20. 20.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
21. 21.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the blackboard (c) in the tap (d) on the bench
22. 22.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it is magnetic (d) it could fall on you
23. 23.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) zero (d) the same
24. 24.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it gets wet (d) it can hurt your finger
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) a pencil (d) yeast
26. 26.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
27. 27.⚖️ 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) True (b) False
28. 28.True or false: a bottle opener is a wheel and axle. (a) True (b) False
29. 29.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) halves the weight (d) makes it magnetic
30. 30.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
31. 31.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) harder (d) the same
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a balloon (c) a battery cell (d) coins as the load
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a mirror (c) turmeric powder (d) a magnet
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) an empty thread reel (c) a pencil (d) a small paper cup
35. 35.🏗️ 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
36. 36.⚖️ 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
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) a pencil (c) an empty thread reel (d) a small paper cup
38. 38.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
39. 39.True or false: a crowbar is a lever. (a) False (b) True
40. 40.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle

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