Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 369 · 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.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets longer (d) it gets wet
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a pencil (c) turmeric powder (d) a battery cell
3. 3.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the bucket floats (c) water gets lighter (d) the rope gets shorter
4. 4.⚖️ 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
5. 5.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
6. 6.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
7. 7.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) down (c) up (d) in a circle
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) a small paper cup (c) a pencil (d) an empty thread reel
10. 10.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a pencil (c) a mirror (d) an empty thread reel
11. 11.⚖️ 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
12. 12.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
13. 13.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
14. 14.True or false: a steering wheel is a lever. (a) True (b) False
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a small paper cup (c) a magnet (d) turmeric powder
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we measure it (c) we keep it the same
17. 17.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) adds weight (d) changes pull direction
18. 18.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
19. 19.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
20. 20.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
21. 21.⚖️ 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) the lifting height (c) number of pulleys (d) how hard we must pull
22. 22.⚖️ 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
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) number of pulleys (c) how hard we must pull (d) the lifting height
24. 24.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
25. 25.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a balloon (c) a mirror (d) turmeric powder
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
28. 28.True or false: a tap handle is an inclined plane. (a) True (b) False
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we keep it the same (c) we measure it
30. 30.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) turmeric powder (c) string (d) coins as the load
32. 32.True or false: a doorknob is a wheel and axle. (a) False (b) True
33. 33.True or false: a crane uses a pulley. (a) False (b) True
34. 34.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) an empty thread reel (c) turmeric powder (d) a balloon
36. 36.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
37. 37.⚙️ Which of these uses a pulley? (a) a sloping road (b) a tap handle (c) a bottle opener (d) a well pulley
38. 38.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) zero (d) about half
39. 39.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a ramp (c) a bottle opener (d) a see-saw
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 keep it the same (b) we change it (c) we measure it

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