Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 478 · 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.🧺 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 magnet (d) a small paper cup
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) turmeric powder (c) an empty thread reel (d) coins as the load
3. 3.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
4. 4.⚙️ Which of these is a lever? (a) a crowbar (b) a crane (c) a well pulley (d) a ramp
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) True (b) False
6. 6.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a battery cell (c) a small paper cup (d) an empty thread reel
8. 8.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 20 cm (d) 10 cm
9. 9.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
10. 10.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
11. 11.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it could fall on you (d) it might sing
12. 12.True or false: a see-saw is an inclined plane. (a) True (b) False
13. 13.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) adds weight (c) makes it magnetic (d) halves the weight
14. 14.⚙️ Which simple machine is a crane? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
15. 15.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
16. 16.⚖️ 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) how hard we must pull (c) number of pulleys (d) the lifting height
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) coins as the load (c) an empty thread reel (d) a small paper cup
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a battery cell (c) a mirror (d) turmeric powder
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) a mirror (d) coins as the load
20. 20.⚖️ 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 keep it the same (c) we change it
21. 21.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
22. 22.True or false: a crane is a lever. (a) True (b) False
23. 23.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
24. 24.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
25. 25.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
26. 26.⚖️ 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 string (c) the lifting height (d) number of pulleys
27. 27.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
28. 28.True or false: string is needed for the thread-reel pulley. (a) False (b) True
29. 29.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a ramp (c) a flagpole (d) a spoon lifting a lid
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) turmeric powder (c) string (d) a balloon
31. 31.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) zero (d) double
32. 32.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) sideways (c) up (d) in a circle
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) yeast (d) a small paper cup
34. 34.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) the same (d) harder
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) an empty thread reel (d) a magnet
36. 36.⚖️ 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
37. 37.True or false: a ramp is an inclined plane. (a) False (b) True
38. 38.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a see-saw (c) a spoon lifting a lid (d) a slide
39. 39.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it turns blue (d) it can hurt your finger
40. 40.True or false: a ramp uses a pulley. (a) True (b) False

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