Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 331 · 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.True or false: a steering wheel is a wheel and axle. (a) False (b) True
2. 2.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) down (c) in a circle (d) up
3. 3.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it might sing (d) it gets hot
4. 4.⚙️ Which of these is a lever? (a) a sloping road (b) a doorknob (c) a flagpole (d) a bottle opener
5. 5.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 5 cm (d) 10 cm
6. 6.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
7. 7.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) nail (c) battery (d) magnet
8. 8.True or false: string is needed for the thread-reel pulley. (a) False (b) True
9. 9.True or false: a sloping road is a wheel and axle. (a) True (b) False
10. 10.True or false: a crane uses a pulley. (a) False (b) True
11. 11.⚖️ 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
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a battery cell (d) a pencil
13. 13.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we measure it (c) we change it
15. 15.🧺 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 pencil (d) string
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) yeast (d) an empty thread reel
17. 17.⚙️ Which simple machine is a crane? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
18. 18.⚖️ 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) True (b) False
19. 19.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
20. 20.⚖️ 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) the same string (c) the same cup of coins (d) how hard we must pull
21. 21.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
22. 22.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
23. 23.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) the same (d) harder
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a magnet (c) a small paper cup (d) coins as the load
25. 25.⚖️ 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
26. 26.⚖️ 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) False (b) True
27. 27.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
28. 28.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a battery cell (c) a balloon (d) a mirror
30. 30.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) a balloon (d) a pencil
32. 32.⚖️ 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) the lifting height (d) number of pulleys
33. 33.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) coins as the load (c) an empty thread reel (d) turmeric powder
35. 35.⚖️ 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
36. 36.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it gets wet (d) it can hurt your finger
37. 37.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
38. 38.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
39. 39.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
40. 40.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False

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