Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 76 · 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? Which of these is what we measure? (a) the same string (b) how hard we must pull (c) the lifting height (d) number of pulleys
2. 2.⚖️ 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 measure it (c) we change it
3. 3.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
4. 4.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) zero (d) double
5. 5.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
6. 6.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
7. 7.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it turns blue (d) it can hurt your finger
8. 8.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a magnet (c) a pencil (d) an empty thread reel
10. 10.⚖️ 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) False (b) True
11. 11.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a tap handle (c) a well pulley (d) a spoon lifting a lid
12. 12.⚖️ 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
13. 13.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a balloon (c) yeast (d) a magnet
15. 15.⚖️ 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
16. 16.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
17. 17.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a small paper cup (c) turmeric powder (d) a balloon
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) True (b) False
20. 20.True or false: a see-saw is a lever. (a) True (b) False
21. 21.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) adds weight (d) makes it magnetic
22. 22.⚖️ 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) True (b) False
23. 23.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it might sing (d) it could fall on you
24. 24.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) pulling down is easier (c) the bucket floats (d) water gets lighter
25. 25.⚙️ Which of these is a lever? (a) a doorknob (b) a well pulley (c) a bottle opener (d) a sloping road
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) an empty thread reel (d) a balloon
27. 27.True or false: a sloping road is a wheel and axle. (a) False (b) True
28. 28.True or false: a crowbar is a lever. (a) True (b) False
29. 29.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) a battery cell (d) string
30. 30.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) the same (d) easier
31. 31.⚖️ 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 cup of coins (c) how hard we must pull
32. 32.⚖️ 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) the lifting height (c) number of pulleys
33. 33.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
34. 34.True or false: a crowbar is an inclined plane. (a) False (b) True
35. 35.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
36. 36.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
37. 37.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a well pulley (c) a sloping road (d) a ramp
38. 38.⚖️ 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
39. 39.⚖️ 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
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True

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