Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 342 · 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.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it could fall on you (c) it is magnetic (d) it might sing
2. 2.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) battery (c) nail (d) magnet
3. 3.⚙️ Which simple machine is a slide? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
4. 4.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
5. 5.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) in a circle (d) down
6. 6.⚖️ 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
7. 7.True or false: a slide is an inclined plane. (a) False (b) True
8. 8.⚖️ 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
9. 9.⚖️ 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) the same string (c) how hard we must pull (d) number of pulleys
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 not needed for the thread-reel pulley? (a) yeast (b) string (c) a pencil (d) coins as the load
12. 12.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a spoon lifting a lid (c) a sloping road (d) a see-saw
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) a pencil (c) an empty thread reel (d) string
14. 14.⚙️ Which simple machine is a ramp? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
15. 15.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 5 cm (d) 40 cm
16. 16.True or false: a ramp is an inclined plane. (a) False (b) True
17. 17.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
18. 18.⚖️ 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
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) a pencil (d) a mirror
20. 20.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) adds weight (c) makes it magnetic (d) halves the weight
21. 21.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) easier (d) the same
22. 22.True or false: string is needed for the thread-reel pulley. (a) False (b) True
23. 23.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
24. 24.⚙️ Which simple machine is a see-saw? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
25. 25.⚖️ 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) the same string (c) number of pulleys (d) the same cup of coins
26. 26.True or false: a well pulley uses a pulley. (a) False (b) True
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a pencil (c) a magnet (d) yeast
28. 28.True or false: a pencil is not needed for the thread-reel pulley. (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? True or false: number of pulleys is the one thing we change. (a) True (b) False
31. 31.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
32. 32.True or false: a well pulley is a lever. (a) False (b) True
33. 33.⚖️ 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 change it (c) we measure it
34. 34.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
35. 35.⚙️ Which of these is a wheel and axle? (a) a crane (b) a spoon lifting a lid (c) a steering wheel (d) a sloping road
36. 36.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a tap handle (c) a sloping road (d) a crowbar
37. 37.⚖️ 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
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) a small paper cup (d) a balloon
39. 39.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
40. 40.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) turmeric powder (c) an empty thread reel (d) a pencil

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