Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 945 · 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.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) changes pull direction (d) halves the weight
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) an empty thread reel (d) a magnet
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) yeast (c) string (d) an empty thread reel
4. 4.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) the same (d) double
5. 5.⚖️ 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
6. 6.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
7. 7.⚖️ 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
8. 8.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
9. 9.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets wet (c) it gets longer (d) it turns blue
10. 10.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) harder (d) the same
11. 11.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a sloping road (c) a flagpole (d) a bottle opener
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) an empty thread reel (d) a mirror
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a magnet (c) an empty thread reel (d) string
14. 14.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
15. 15.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
16. 16.⚖️ 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) the same string (c) how hard we must pull
17. 17.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) coins as the load (c) an empty thread reel (d) a pencil
19. 19.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
20. 20.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) an empty thread reel (d) a battery cell
22. 22.True or false: a ramp uses a pulley. (a) True (b) False
23. 23.⚖️ 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) False (b) True
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) a pencil (d) yeast
25. 25.True or false: a crowbar uses a pulley. (a) False (b) True
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) coins as the load (c) a small paper cup (d) an empty thread reel
27. 27.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a sloping road (c) a ramp (d) a flagpole
28. 28.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
29. 29.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
30. 30.⚙️ Which of these is a lever? (a) a crane (b) a see-saw (c) a well pulley (d) a slide
31. 31.⚖️ 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) how hard we must pull (c) number of pulleys (d) the same cup of coins
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a battery cell (d) coins as the load
33. 33.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) water gets lighter (d) pulling down is easier
34. 34.⚙️ Which simple machine is a crane? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
35. 35.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
36. 36.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
37. 37.True or false: string is needed for the thread-reel pulley. (a) False (b) True
38. 38.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it gets hot (d) it is magnetic
39. 39.⚙️ Which of these uses a pulley? (a) a crane (b) a steering wheel (c) a slide (d) a sloping road
40. 40.True or false: a see-saw is a wheel and axle. (a) False (b) True

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