Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 946 · 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.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) up (c) in a circle (d) sideways
2. 2.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) pulling down is easier (d) the rope gets shorter
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) a balloon (d) an empty thread reel
4. 4.⚖️ 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
5. 5.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it turns blue (d) it gets longer
6. 6.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
7. 7.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) zero (d) double
8. 8.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) in the tap (c) on the flagpole (d) on the blackboard
9. 9.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) makes it magnetic (c) halves the weight (d) adds weight
10. 10.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
11. 11.🧺 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 magnet
12. 12.⚙️ Which of these is a lever? (a) a tap handle (b) a see-saw (c) a sloping road (d) a well pulley
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) how hard we must pull (c) the same string (d) the same cup of coins
14. 14.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) a small paper cup (c) string (d) a pencil
16. 16.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
17. 17.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
18. 18.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 20 cm (d) 5 cm
19. 19.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) string (c) yeast (d) a magnet
21. 21.⚖️ 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) False (b) True
22. 22.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
23. 23.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
24. 24.True or false: a spoon lifting a lid is a lever. (a) False (b) True
25. 25.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
27. 27.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it might sing (d) it is magnetic
28. 28.⚖️ 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) True (b) False
29. 29.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
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 pencil (b) an empty thread reel (c) string (d) a magnet
32. 32.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
33. 33.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
34. 34.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a balloon (c) yeast (d) a pencil
36. 36.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
37. 37.⚖️ 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
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) an empty thread reel (d) yeast
39. 39.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
40. 40.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane

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