Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 690 · 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: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
2. 2.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
3. 3.⚖️ 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 keep it the same (c) we change it
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same string (b) number of pulleys (c) how hard we must pull (d) the same cup of coins
5. 5.True or false: a well pulley is an inclined plane. (a) True (b) False
6. 6.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a see-saw (c) a bottle opener (d) a crane
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) turmeric powder (c) coins as the load (d) a pencil
8. 8.⚖️ 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
9. 9.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) rope (d) nail
10. 10.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
11. 11.⚙️ Which of these is a lever? (a) a slide (b) a bottle opener (c) a doorknob (d) a crane
12. 12.True or false: a steering wheel uses a pulley. (a) False (b) True
13. 13.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) water gets lighter (c) the bucket floats (d) the rope gets shorter
14. 14.⚙️ Which of these uses a pulley? (a) a sloping road (b) a tap handle (c) a doorknob (d) a crane
15. 15.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
16. 16.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) changes pull direction (d) makes it magnetic
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) yeast (c) coins as the load (d) a balloon
18. 18.⚙️ Which of these is a lever? (a) a crowbar (b) a tap handle (c) a sloping road (d) a ramp
19. 19.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) harder (d) impossible
20. 20.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) yeast (d) string
21. 21.⚖️ 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 cup of coins (c) the lifting height (d) how hard we must pull
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) a small paper cup (c) coins as the load (d) string
23. 23.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
24. 24.⚙️ Which of these uses a pulley? (a) a tap handle (b) a well pulley (c) a steering wheel (d) a crowbar
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a balloon (c) a pencil (d) string
26. 26.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
27. 27.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) yeast (c) coins as the load (d) an empty thread reel
29. 29.⚖️ 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) the lifting height (c) number of pulleys
30. 30.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
31. 31.⚙️ Which simple machine is a see-saw? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
32. 32.⚖️ 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
33. 33.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a slide (c) a sloping road (d) a crowbar
34. 34.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
35. 35.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a well pulley (c) a slide (d) a steering wheel
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) a small paper cup (d) yeast
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) a balloon (d) a small paper cup
38. 38.🛟 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
39. 39.⚙️ Which of these is an inclined plane? (a) a ramp (b) a steering wheel (c) a crane (d) a well pulley
40. 40.⚖️ 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

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