Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 852 · 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.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) about half (d) zero
2. 2.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
3. 3.True or false: a flagpole is a wheel and axle. (a) False (b) True
4. 4.True or false: a balloon is not needed for the thread-reel pulley. (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) a pencil (c) coins as the load (d) string
6. 6.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) down (d) up
7. 7.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) battery (c) magnet (d) rope
8. 8.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it is magnetic (d) it gets hot
9. 9.⚖️ 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
10. 10.⚖️ 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
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a balloon (d) coins as the load
12. 12.⚖️ 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
13. 13.🧺 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) a battery cell (d) a pencil
14. 14.🏗️ 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
15. 15.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
16. 16.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a sloping road (c) a crane (d) a slide
17. 17.⚙️ Which of these uses a pulley? (a) a sloping road (b) a tap handle (c) a well pulley (d) a see-saw
18. 18.⚖️ 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 measure it (c) we keep it the same
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) False (b) True
20. 20.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
21. 21.True or false: a crowbar uses a pulley. (a) True (b) False
22. 22.True or false: a spoon lifting a lid uses a pulley. (a) False (b) True
23. 23.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 10 cm (d) 20 cm
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we change it (c) we measure it
25. 25.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
26. 26.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
27. 27.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) the same (d) easier
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) turmeric powder (c) string (d) coins as the load
29. 29.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a pencil (c) a balloon (d) an empty thread reel
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
31. 31.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
32. 32.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
33. 33.⚙️ Which simple machine is a well pulley? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
34. 34.⚖️ 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
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a pencil (c) turmeric powder (d) a small paper cup
36. 36.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) adds weight (c) makes it magnetic (d) halves the weight
37. 37.⚖️ 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) how hard we must pull
38. 38.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) a pencil (c) an empty thread reel (d) string
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) an empty thread reel (c) turmeric powder (d) a magnet

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