Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 833 · 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 more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) harder (d) easier
2. 2.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) changes pull direction (d) makes it magnetic
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) a balloon (d) an empty thread reel
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) yeast (c) string (d) a magnet
5. 5.🧺 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
6. 6.🧺 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) turmeric powder (d) a pencil
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) how hard we must pull (c) the lifting height (d) the same string
8. 8.True or false: a sloping road is an inclined plane. (a) False (b) True
9. 9.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
10. 10.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) coins as the load (c) a balloon (d) a magnet
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) string (c) a small paper cup (d) a pencil
14. 14.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
15. 15.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a sloping road (c) a bottle opener (d) a doorknob
16. 16.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
17. 17.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it is magnetic (d) it gets hot
18. 18.⚙️ Which simple machine is a crowbar? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
19. 19.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) yeast (c) a pencil (d) a magnet
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) an empty thread reel (d) a balloon
22. 22.⚖️ 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
23. 23.True or false: a ramp is a wheel and axle. (a) True (b) False
24. 24.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it gets wet (d) it can hurt your finger
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) how hard we must pull (b) number of pulleys (c) the lifting height (d) the same string
26. 26.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
27. 27.True or false: a crowbar is a lever. (a) False (b) True
28. 28.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) sideways (c) down (d) up
29. 29.True or false: a spoon lifting a lid is a lever. (a) True (b) False
30. 30.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
31. 31.True or false: a bottle opener uses a pulley. (a) True (b) False
32. 32.⚖️ 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
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) True (b) False
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a magnet (c) string (d) an empty thread reel
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 measure it (b) we change it (c) we keep it the same
36. 36.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) rope (d) nail
37. 37.True or false: a pencil 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? What do we do with “how hard we must pull”? (a) we measure it (b) we change it (c) we keep it the same
39. 39.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
40. 40.True or false: a see-saw is an inclined plane. (a) False (b) True

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