Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 644 · 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: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
2. 2.True or false: a bottle opener uses a pulley. (a) False (b) True
3. 3.True or false: a see-saw is an inclined plane. (a) False (b) True
4. 4.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it gets wet (d) it turns blue
5. 5.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) makes it magnetic (d) adds weight
6. 6.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a sloping road (c) a tap handle (d) a see-saw
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) True (b) False
8. 8.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
9. 9.⚖️ 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 string (c) number of pulleys (d) the same cup of coins
10. 10.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
11. 11.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) a small paper cup (d) a magnet
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a magnet (d) a pencil
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a battery cell (c) turmeric powder (d) a balloon
14. 14.True or false: a spoon lifting a lid is a lever. (a) False (b) True
15. 15.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
16. 16.True or false: a doorknob uses a pulley. (a) True (b) False
17. 17.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) zero (d) the same
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) a battery cell (d) a mirror
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) turmeric powder (c) a small paper cup (d) an empty thread reel
20. 20.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) impossible (d) the same
21. 21.True or false: a bottle opener is a wheel and axle. (a) True (b) False
22. 22.⚙️ Which of these is a wheel and axle? (a) a slide (b) a see-saw (c) a tap handle (d) a flagpole
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a balloon (c) a pencil (d) a magnet
24. 24.⚖️ 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
25. 25.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
26. 26.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
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) True (b) False
29. 29.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a flagpole (c) a sloping road (d) a well pulley
30. 30.⚖️ 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) how hard we must pull
31. 31.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
33. 33.⚖️ 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
34. 34.⚖️ 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 cup of coins
35. 35.True or false: a spoon lifting a lid is a wheel and axle. (a) False (b) True
36. 36.⚖️ 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
37. 37.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the bench (c) on the flagpole (d) in the tap
38. 38.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
39. 39.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) a battery cell (d) an empty thread reel
40. 40.⚖️ 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 keep it the same (c) we measure it

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