Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 759 · 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.⚖️ 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
2. 2.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
3. 3.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
4. 4.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the flagpole (c) on the blackboard (d) on the bench
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) a pencil (d) yeast
6. 6.⚖️ 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
7. 7.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
8. 8.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a tap handle (c) a crane (d) a bottle opener
9. 9.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
10. 10.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) harder (d) impossible
11. 11.⚖️ 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 cup of coins (c) the same string (d) how hard we must pull
12. 12.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
13. 13.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) down (c) in a circle (d) sideways
14. 14.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) a pencil (c) coins as the load (d) an empty thread reel
15. 15.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) an empty thread reel (c) coins as the load (d) a small paper cup
17. 17.⚙️ Which simple machine is a flagpole? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
18. 18.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
19. 19.🔮 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
20. 20.⚖️ 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
21. 21.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
22. 22.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) zero (d) double
23. 23.⚙️ Which of these is an inclined plane? (a) a ramp (b) a bottle opener (c) a crowbar (d) a doorknob
24. 24.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) rope (d) nail
25. 25.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
26. 26.⚖️ 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
27. 27.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a magnet (c) a pencil (d) coins as the load
29. 29.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
30. 30.🧺 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) a mirror
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a mirror (c) yeast (d) a pencil
32. 32.⚙️ Which simple machine is a crane? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a magnet (c) a pencil (d) an empty thread reel
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a battery cell (c) a small paper cup (d) turmeric powder
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) turmeric powder (c) a magnet (d) an empty thread reel
37. 37.⚖️ 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
38. 38.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
39. 39.⚖️ 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 keep it the same (c) we change it
40. 40.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True

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