Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 741 · 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 doorknob is a lever. (a) False (b) True
2. 2.⚖️ 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 lifting height (c) how hard we must pull (d) the same string
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) how hard we must pull (c) number of pulleys (d) the lifting height
4. 4.🏗️ 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
5. 5.⚖️ 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 keep it the same (c) we change it
6. 6.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it turns blue (d) it can hurt your finger
7. 7.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it is magnetic (d) it could fall on you
8. 8.⚙️ Which simple machine is a slide? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) yeast (d) a small paper cup
10. 10.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
11. 11.True or false: a steering wheel is a wheel and axle. (a) True (b) False
12. 12.⚖️ 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
13. 13.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
14. 14.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) False (b) True
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a balloon (d) a small paper cup
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) yeast (c) a magnet (d) an empty thread reel
18. 18.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
19. 19.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the flagpole (c) in the tap (d) on the bench
20. 20.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a sloping road (c) a flagpole (d) a spoon lifting a lid
21. 21.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
22. 22.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
23. 23.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) nail (c) rope (d) magnet
24. 24.⚖️ 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
25. 25.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
26. 26.⚙️ Which simple machine is a sloping road? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
27. 27.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) harder (d) easier
28. 28.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) zero (d) double
29. 29.True or false: a bottle opener is a lever. (a) False (b) True
30. 30.⚖️ 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
31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) an empty thread reel (d) a balloon
32. 32.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a battery cell (c) a small paper cup (d) a pencil
34. 34.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
35. 35.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
36. 36.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a well pulley (c) a slide (d) a flagpole
37. 37.True or false: turmeric powder 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? True or false: how hard we must pull is what we measure. (a) False (b) True
39. 39.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
40. 40.⚙️ Which of these uses a pulley? (a) a crane (b) a crowbar (c) a tap handle (d) a steering wheel

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