Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 161 · 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.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) the same (d) impossible
2. 2.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
3. 3.⚖️ 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) the lifting height (d) the same string
4. 4.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it gets hot (d) it might sing
5. 5.⚖️ 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) False (b) True
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) turmeric powder (d) a small paper cup
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) string (c) an empty thread reel (d) a mirror
8. 8.⚙️ Which of these is a lever? (a) a steering wheel (b) a spoon lifting a lid (c) a flagpole (d) a slide
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) turmeric powder (c) a mirror (d) string
10. 10.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it can hurt your finger (d) it gets wet
11. 11.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
12. 12.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
13. 13.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) down (d) up
14. 14.⚙️ Which simple machine is a ramp? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
15. 15.True or false: a crane is a lever. (a) True (b) False
16. 16.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) the same (d) about half
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a balloon (c) a magnet (d) an empty thread reel
18. 18.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) changes pull direction (d) halves the weight
19. 19.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
20. 20.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
21. 21.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same string (b) number of pulleys (c) how hard we must pull
23. 23.⚙️ Which of these is a lever? (a) a ramp (b) a steering wheel (c) a slide (d) a see-saw
24. 24.⚖️ 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 lifting height (c) the same cup of coins (d) number of pulleys
25. 25.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a small paper cup (d) a magnet
27. 27.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
28. 28.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
29. 29.True or false: a doorknob is a wheel and axle. (a) True (b) False
30. 30.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) a small paper cup (c) coins as the load (d) a pencil
31. 31.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) a pencil (c) coins as the load (d) a small paper cup
33. 33.⚙️ Which of these is a lever? (a) a doorknob (b) a crane (c) a bottle opener (d) a flagpole
34. 34.True or false: a see-saw is an inclined plane. (a) False (b) True
35. 35.True or false: a well pulley uses a pulley. (a) True (b) False
36. 36.⚖️ 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
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we keep it the same (c) we measure it
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) coins as the load (d) a battery cell
39. 39.⚖️ 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 same cup of coins
40. 40.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley

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