Pulley STEM Project Worksheet

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

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