Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 808 · 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 kept the same? (a) how hard we must pull (b) number of pulleys (c) the same cup of coins
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) yeast (c) an empty thread reel (d) a battery cell
3. 3.⚙️ Which simple machine is a well pulley? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
4. 4.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) in a circle (c) sideways (d) down
5. 5.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
6. 6.True or false: a steering wheel is a wheel and axle. (a) False (b) True
7. 7.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
8. 8.True or false: string is needed for the thread-reel pulley. (a) True (b) False
9. 9.⚖️ 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
10. 10.True or false: a spoon lifting a lid is a wheel and axle. (a) False (b) True
11. 11.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) easier (d) harder
12. 12.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
13. 13.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 40 cm (d) 20 cm
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) string (d) a mirror
15. 15.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
16. 16.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
17. 17.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
18. 18.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
19. 19.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not 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 lifting height (b) how hard we must pull (c) the same cup of coins (d) number of pulleys
21. 21.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) coins as the load (c) string (d) a pencil
23. 23.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) the same cup of coins (c) number of pulleys (d) the same string
25. 25.🛟 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
26. 26.⚖️ 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
27. 27.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
28. 28.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) False (b) True
31. 31.⚖️ 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 measure it (b) we keep it the same (c) we change it
32. 32.True or false: a tap handle is an inclined plane. (a) True (b) False
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a mirror (d) coins as the load
34. 34.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) makes it magnetic (c) adds weight (d) halves the weight
35. 35.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) double (d) the same
36. 36.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it is magnetic (d) it might sing
37. 37.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
38. 38.⚖️ 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) number of pulleys (c) how hard we must pull
39. 39.⚙️ Which of these uses a pulley? (a) a see-saw (b) a crane (c) a ramp (d) a steering wheel
40. 40.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed

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