Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 919 · 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.⚖️ 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 change it (c) we measure it
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a magnet (c) coins as the load (d) an empty thread reel
3. 3.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
4. 4.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
5. 5.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
6. 6.⚖️ 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
7. 7.⚙️ Which of these is a lever? (a) a well pulley (b) a steering wheel (c) a bottle opener (d) a doorknob
8. 8.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
9. 9.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
10. 10.⚖️ 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
11. 11.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it gets wet (d) it turns blue
12. 12.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
13. 13.⚖️ 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
14. 14.🛟 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
15. 15.True or false: a slide is a wheel and axle. (a) True (b) False
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a small paper cup (c) an empty thread reel (d) turmeric powder
17. 17.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
18. 18.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) sideways (d) down
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a balloon (d) a pencil
20. 20.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a doorknob (c) a see-saw (d) a ramp
21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) a balloon (d) a small paper cup
22. 22.⚖️ 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) False (b) True
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) the same cup of coins (c) the same string (d) how hard we must pull
24. 24.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
25. 25.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) harder (d) easier
26. 26.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) halves the weight (c) changes pull direction (d) adds weight
27. 27.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 10 cm (d) 40 cm
28. 28.⚖️ 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
29. 29.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) zero (d) about half
30. 30.⚖️ 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
31. 31.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) pulling down is easier (d) the bucket floats
32. 32.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) an empty thread reel (d) a battery cell
34. 34.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
36. 36.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
37. 37.⚙️ Which of these is a lever? (a) a sloping road (b) a slide (c) a flagpole (d) a see-saw
38. 38.⚖️ 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) the same cup of coins (c) number of pulleys (d) the lifting height
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) True (b) False
40. 40.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False

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