Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 386 · 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.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it is magnetic (d) it might sing
2. 2.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) coins as the load (c) a magnet (d) a battery cell
4. 4.True or false: string is needed for the thread-reel pulley. (a) False (b) True
5. 5.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
6. 6.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
7. 7.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
9. 9.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
10. 10.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) magnet (c) battery (d) rope
11. 11.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a crowbar (c) a spoon lifting a lid (d) a ramp
12. 12.⚖️ 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
13. 13.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a balloon (c) a pencil (d) a small paper cup
15. 15.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
16. 16.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
17. 17.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) the same (d) double
18. 18.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
20. 20.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 5 cm (d) 20 cm
21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a battery cell (c) an empty thread reel (d) a pencil
22. 22.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
23. 23.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
24. 24.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) harder (d) easier
25. 25.⚖️ 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
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a balloon (c) coins as the load (d) string
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) a small paper cup (c) string (d) an empty thread reel
28. 28.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
29. 29.⚖️ 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
30. 30.⚖️ 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) True (b) False
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) the same string (c) number of pulleys (d) how hard we must pull
32. 32.⚖️ 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 measure it (c) we keep it the same
33. 33.⚖️ 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) number of pulleys (c) the lifting height (d) how hard we must pull
34. 34.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a battery cell (c) a balloon (d) an empty thread reel
36. 36.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) a pencil (c) string (d) an empty thread reel
38. 38.⚖️ 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
39. 39.True or false: a spoon lifting a lid is a lever. (a) True (b) False
40. 40.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False

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