Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 939 · 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) adds weight (b) makes it magnetic (c) changes pull direction (d) halves the weight
2. 2.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) harder (d) impossible
3. 3.True or false: a flagpole is a wheel and axle. (a) False (b) True
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) yeast (c) a small paper cup (d) string
5. 5.⚖️ 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
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) the same cup of coins (c) the lifting height (d) number of pulleys
8. 8.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
9. 9.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it gets wet (d) it can hurt your finger
10. 10.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) the rope gets shorter (d) pulling down is easier
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) an empty thread reel (c) a small paper cup (d) coins as the load
12. 12.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
13. 13.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 5 cm (c) 20 cm (d) 10 cm
14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a battery cell (c) a magnet (d) yeast
15. 15.⚖️ 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) how hard we must pull (c) the same string (d) the same cup of coins
16. 16.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
17. 17.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) in a circle (c) down (d) sideways
18. 18.⚖️ 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 measure it (b) we change it (c) we keep it the same
19. 19.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) the same (d) zero
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a magnet (c) turmeric powder (d) string
21. 21.True or false: a bottle opener is a lever. (a) False (b) True
22. 22.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it is magnetic (d) it could fall on you
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) a pencil (d) a balloon
24. 24.True or false: a well pulley is an inclined plane. (a) False (b) True
25. 25.True or false: a sloping road is an inclined plane. (a) True (b) False
26. 26.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
27. 27.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
28. 28.True or false: a crowbar is a lever. (a) True (b) False
29. 29.True or false: a tap handle is a wheel and axle. (a) True (b) False
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) coins as the load (c) an empty thread reel (d) a small paper cup
31. 31.True or false: a slide is an inclined plane. (a) True (b) False
32. 32.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
33. 33.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a well pulley (c) a slide (d) a bottle opener
34. 34.⚙️ Which of these is a lever? (a) a flagpole (b) a doorknob (c) a tap handle (d) a crowbar
35. 35.True or false: a steering wheel is a wheel and axle. (a) False (b) True
36. 36.⚖️ 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
37. 37.⚖️ 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 change it (b) we measure it (c) we keep it the same
38. 38.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
39. 39.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
40. 40.⚖️ 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) number of pulleys (c) the lifting height

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