Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 628 · 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.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) turmeric powder (c) an empty thread reel (d) a magnet
3. 3.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) changes pull direction (d) adds weight
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.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it could fall on you (c) it is magnetic (d) it might sing
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a balloon (c) coins as the load (d) string
7. 7.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
8. 8.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
9. 9.⚙️ Which simple machine is a bottle opener? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
10. 10.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
11. 11.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
12. 12.⚖️ 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) False (b) True
13. 13.⚖️ 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) False (b) True
14. 14.⚖️ 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 cup of coins (b) how hard we must pull (c) number of pulleys (d) the same string
15. 15.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
16. 16.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
17. 17.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) sideways (c) down (d) up
18. 18.True or false: a crane is a wheel and axle. (a) False (b) True
19. 19.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it can hurt your finger (d) it gets wet
20. 20.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) coins as the load (d) a balloon
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we change it (c) we keep it the same
22. 22.⚖️ 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 keep it the same (b) we change it (c) we measure it
23. 23.⚙️ Which of these is a lever? (a) a well pulley (b) a flagpole (c) a see-saw (d) a tap handle
24. 24.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) a battery cell (d) string
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a pencil (c) a mirror (d) a magnet
27. 27.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
28. 28.True or false: a steering wheel is a lever. (a) True (b) False
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a magnet (c) a battery cell (d) turmeric powder
30. 30.⚙️ Which of these is a wheel and axle? (a) a slide (b) a steering wheel (c) a flagpole (d) a ramp
31. 31.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
32. 32.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) turmeric powder (d) coins as the load
34. 34.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) string (d) yeast
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a mirror (c) string (d) a pencil
37. 37.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) in the tap (c) on the blackboard (d) on the flagpole
38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) turmeric powder (d) coins as the load
39. 39.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
40. 40.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever

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