Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 912 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) a magnet (d) a small paper cup
2. 2.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
3. 3.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) double (d) the same
4. 4.⚖️ 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 keep it the same (b) we measure it (c) we change it
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) number of pulleys (c) the same string (d) the same cup of coins
6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) a battery cell (d) coins as the load
7. 7.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 10 cm (d) 20 cm
8. 8.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) in a circle (d) down
9. 9.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a small paper cup (d) turmeric powder
11. 11.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a mirror (c) an empty thread reel (d) coins as the load
13. 13.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
14. 14.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) coins as the load (c) a small paper cup (d) an empty thread reel
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) an empty thread reel (d) a battery cell
16. 16.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
17. 17.True or false: a well pulley is a wheel and axle. (a) True (b) False
18. 18.⚙️ Which of these is a lever? (a) a ramp (b) a steering wheel (c) a spoon lifting a lid (d) a well pulley
19. 19.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
20. 20.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
21. 21.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
22. 22.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) makes it magnetic (d) halves the weight
23. 23.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a well pulley (c) a slide (d) a crane
24. 24.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it is magnetic (d) it might sing
25. 25.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
26. 26.🇮🇳 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
27. 27.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
28. 28.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it turns blue (c) it gets longer (d) it gets wet
29. 29.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a doorknob (c) a bottle opener (d) a crane
30. 30.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) coins as the load (c) yeast (d) a small paper cup
31. 31.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
32. 32.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
33. 33.⚖️ 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 keep it the same (c) we change it
34. 34.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the rope gets shorter (c) the bucket floats (d) water gets lighter
35. 35.⚖️ 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 keep it the same (c) we measure it
36. 36.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
37. 37.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) coins as the load (c) a magnet (d) a mirror
38. 38.⚖️ 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
39. 39.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
40. 40.True or false: a see-saw is a lever. (a) True (b) False

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