Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 382 · 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.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) double (d) the same
3. 3.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) easier (d) the same
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) string (d) yeast
5. 5.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
6. 6.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) an empty thread reel (d) a mirror
8. 8.⚖️ 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
9. 9.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it turns blue (d) it gets wet
10. 10.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) water gets lighter (c) the rope gets shorter (d) the bucket floats
11. 11.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
12. 12.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) in a circle (d) down
13. 13.🧺 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 small paper cup (d) a magnet
14. 14.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 5 cm (c) 10 cm (d) 40 cm
15. 15.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
16. 16.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
17. 17.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) makes it magnetic (d) changes pull direction
18. 18.⚖️ 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
19. 19.⚙️ Which of these is a lever? (a) a ramp (b) a crowbar (c) a slide (d) a flagpole
20. 20.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) how hard we must pull (c) number of pulleys (d) the same cup of coins
22. 22.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it could fall on you (d) it gets hot
23. 23.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
24. 24.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) turmeric powder (d) a small paper cup
26. 26.⚖️ 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
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a small paper cup (c) a magnet (d) yeast
28. 28.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
29. 29.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) battery (c) magnet (d) nail
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) coins as the load (c) an empty thread reel (d) a pencil
31. 31.⚖️ 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) True (b) False
32. 32.True or false: a flagpole uses a pulley. (a) True (b) False
33. 33.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) True (b) False
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a balloon (c) a battery cell (d) an empty thread reel
36. 36.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
37. 37.⚙️ Which simple machine is a doorknob? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
38. 38.True or false: a well pulley uses a pulley. (a) False (b) True
39. 39.True or false: a see-saw is a wheel and axle. (a) True (b) False
40. 40.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False

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