Pulley STEM Project Worksheet

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

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