Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 774 · 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.True or false: a flagpole is an inclined plane. (a) False (b) True
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a mirror (c) a pencil (d) a small paper cup
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) the same string (c) the same cup of coins (d) the lifting height
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we measure it (c) we keep it the same
5. 5.True or false: a see-saw uses a pulley. (a) False (b) True
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a battery cell (d) coins as the load
7. 7.⚖️ 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) number of pulleys (d) how hard we must pull
8. 8.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it might sing (d) it could fall on you
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) yeast (c) coins as the load (d) string
10. 10.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) impossible (d) easier
11. 11.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
12. 12.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
13. 13.⚖️ 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
14. 14.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) pulling down is easier (c) water gets lighter (d) the bucket floats
15. 15.⚙️ Which of these is a lever? (a) a slide (b) a steering wheel (c) a spoon lifting a lid (d) a sloping road
16. 16.⚖️ 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) True (b) False
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) turmeric powder (c) an empty thread reel (d) a battery cell
18. 18.⚖️ 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
19. 19.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) halves the weight (d) changes pull direction
20. 20.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
21. 21.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) a balloon (d) a small paper cup
23. 23.⚖️ 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 measure it (c) we change it
24. 24.⚖️ 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
25. 25.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) turmeric powder (c) an empty thread reel (d) a pencil
27. 27.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
28. 28.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a bottle opener (c) a flagpole (d) a steering wheel
29. 29.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
30. 30.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
31. 31.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) down (c) up (d) sideways
32. 32.⚖️ 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
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) coins as the load (c) a balloon (d) turmeric powder
34. 34.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
35. 35.True or false: a flagpole uses a pulley. (a) True (b) False
36. 36.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
37. 37.⚖️ 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 lifting height (c) how hard we must pull
38. 38.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) rope (d) nail
39. 39.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a well pulley (c) a sloping road (d) a see-saw
40. 40.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a small paper cup (c) an empty thread reel (d) a magnet

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