Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 977 · 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.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) halves the weight (c) makes it magnetic (d) adds weight
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) how hard we must pull (c) number of pulleys
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) string (c) a pencil (d) an empty thread reel
4. 4.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
5. 5.⚖️ 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
6. 6.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a well pulley (c) a doorknob (d) a spoon lifting a lid
7. 7.⚖️ 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
8. 8.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a pencil (d) a mirror
10. 10.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) a mirror (d) coins as the load
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) turmeric powder (c) a pencil (d) an empty thread reel
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we keep it the same (c) we change it
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) an empty thread reel (d) a battery cell
14. 14.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we change it (c) we keep it the same
16. 16.True or false: a crowbar is a lever. (a) True (b) False
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) the same string (c) how hard we must pull
19. 19.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
20. 20.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a flagpole (c) a crowbar (d) a steering wheel
21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) an empty thread reel (d) turmeric powder
22. 22.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) an empty thread reel (d) yeast
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a pencil (c) turmeric powder (d) a battery cell
25. 25.⚙️ Which of these is a lever? (a) a see-saw (b) a tap handle (c) a slide (d) a crane
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
27. 27.⚖️ 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
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) a magnet (d) an empty thread reel
29. 29.⚖️ 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
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
31. 31.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) down (d) sideways
32. 32.⚖️ 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 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? Which of these is what we measure? (a) how hard we must pull (b) number of pulleys (c) the same cup of coins (d) the lifting height
34. 34.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
35. 35.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
36. 36.True or false: a ramp is a wheel and axle. (a) True (b) False
37. 37.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) True (b) False
39. 39.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
40. 40.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed

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