Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 250 · 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 small paper cup (b) a battery cell (c) coins as the load (d) string
2. 2.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it could fall on you (c) it might sing (d) it is magnetic
3. 3.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
4. 4.⚖️ 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
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) an empty thread reel (c) coins as the load (d) a small paper cup
6. 6.⚖️ 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
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) string (d) a mirror
8. 8.⚖️ 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) how hard we must pull (c) number of pulleys
9. 9.🧺 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) string (d) a pencil
10. 10.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) impossible (d) easier
11. 11.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) a pencil (d) string
13. 13.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it can hurt your finger (d) it gets longer
14. 14.🔮 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
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “how hard we must pull”? (a) we keep it the same (b) we measure it (c) we change it
16. 16.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) coins as the load (d) turmeric powder
18. 18.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) pulling down is easier (c) the rope gets shorter (d) water gets lighter
19. 19.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
20. 20.⚖️ 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 cup of coins (b) the lifting height (c) number of pulleys (d) how hard we must pull
21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) an empty thread reel (d) coins as the load
22. 22.⚙️ Which of these is a wheel and axle? (a) a slide (b) a tap handle (c) a sloping road (d) a well pulley
23. 23.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
24. 24.True or false: a doorknob is a wheel and axle. (a) False (b) True
25. 25.⚖️ 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 change it (b) we keep it the same (c) we measure it
26. 26.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we keep it the same (c) we change it
28. 28.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) double (d) zero
29. 29.⚖️ 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) False (b) True
30. 30.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
31. 31.True or false: string is needed for the thread-reel pulley. (a) False (b) True
32. 32.🧺 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) string (d) yeast
33. 33.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
34. 34.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) up (d) down
35. 35.⚖️ 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) True (b) False
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
37. 37.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) nail (d) magnet
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) a small paper cup (c) an empty thread reel (d) a pencil
39. 39.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
40. 40.⚖️ 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) number of pulleys (c) how hard we must pull (d) the lifting height

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