Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 956 · 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.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a pencil (d) turmeric powder
3. 3.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) the bucket floats (d) pulling down is easier
4. 4.⚖️ 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) how hard we must pull
5. 5.⚖️ 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
6. 6.True or false: a crowbar is an inclined plane. (a) True (b) False
7. 7.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it gets wet (d) it turns blue
8. 8.True or false: a doorknob is a lever. (a) True (b) False
9. 9.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) easier (d) impossible
10. 10.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) turmeric powder (d) a pencil
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 change it (b) we keep it the same (c) we measure it
12. 12.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
13. 13.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) down (c) up (d) in a circle
14. 14.⚖️ 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) how hard we must pull (c) number of pulleys (d) the same string
15. 15.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we measure it (c) we keep it the same
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) yeast (c) a pencil (d) an empty thread reel
18. 18.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
19. 19.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) string (c) a small paper cup (d) coins as the load
21. 21.⚖️ 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 lifting height
22. 22.True or false: a flagpole uses a pulley. (a) False (b) True
23. 23.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
24. 24.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
25. 25.⚙️ Which of these is a lever? (a) a crowbar (b) a sloping road (c) a slide (d) a tap handle
26. 26.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
27. 27.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) double (d) the same
28. 28.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) coins as the load (d) a balloon
29. 29.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) True (b) False
31. 31.🛟 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
32. 32.⚙️ Which of these is a wheel and axle? (a) a crane (b) a crowbar (c) a well pulley (d) a doorknob
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) turmeric powder (c) a balloon (d) a magnet
34. 34.⚖️ 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) False (b) True
35. 35.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
36. 36.True or false: an empty thread reel is not needed for the thread-reel pulley. (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 needed for the thread-reel pulley? (a) yeast (b) a mirror (c) a battery cell (d) coins as the load
39. 39.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
40. 40.⚖️ 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 string (c) how hard we must pull

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