Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 132 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) turmeric powder (d) string
2. 2.⚖️ 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 same string (c) number of pulleys
3. 3.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) makes it magnetic (d) changes pull direction
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) True (b) False
5. 5.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) a pencil (d) a battery cell
7. 7.True or false: a flagpole is an inclined plane. (a) False (b) True
8. 8.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it is magnetic (d) it could fall on you
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) turmeric powder (c) an empty thread reel (d) a small paper cup
10. 10.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets wet (d) it gets longer
11. 11.⚖️ 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 change it (b) we keep it the same (c) we measure it
12. 12.⚖️ 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
13. 13.⚙️ Which simple machine is a slide? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
14. 14.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
15. 15.True or false: a crowbar is a lever. (a) True (b) False
16. 16.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) the same (d) impossible
17. 17.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
18. 18.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) the same (d) zero
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a battery cell (c) a mirror (d) a balloon
20. 20.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
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.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
23. 23.⚖️ 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) number of pulleys (c) the lifting height (d) the same string
24. 24.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
25. 25.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
26. 26.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 10 cm (d) 5 cm
27. 27.⚖️ 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 same string
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
29. 29.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
30. 30.⚖️ 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 keep it the same (c) we measure it
31. 31.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a tap handle (c) a see-saw (d) a slide
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we keep it the same (c) we measure it
33. 33.True or false: a flagpole uses a pulley. (a) True (b) False
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a mirror (c) an empty thread reel (d) a small paper cup
35. 35.⚖️ 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
36. 36.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a see-saw (c) a bottle opener (d) a steering wheel
37. 37.⚙️ Which simple machine is a ramp? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
38. 38.True or false: a crowbar is a wheel and axle. (a) True (b) False
39. 39.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
40. 40.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a crane (c) a steering wheel (d) a see-saw

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