Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 540 · 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) a battery cell (b) string (c) a pencil (d) an empty thread reel
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we keep it the same (c) we change it
3. 3.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) a balloon (d) an empty thread reel
5. 5.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
6. 6.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it gets hot (d) it could fall on you
7. 7.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
8. 8.⚖️ 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 string (b) how hard we must pull (c) the same cup of coins (d) number of pulleys
9. 9.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 20 cm (d) 40 cm
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 sloping road is a lever. (a) False (b) True
12. 12.⚖️ 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 change it (b) we keep it the same (c) we measure it
13. 13.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
14. 14.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
15. 15.True or false: a spoon lifting a lid is a wheel and axle. (a) True (b) False
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) yeast (d) a small paper cup
17. 17.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it gets wet (d) it turns blue
18. 18.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a magnet (c) an empty thread reel (d) a pencil
21. 21.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
22. 22.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
23. 23.⚖️ 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
24. 24.⚖️ 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 change it (c) we measure it
25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a mirror (c) string (d) a battery cell
26. 26.⚙️ Which of these is a lever? (a) a crane (b) a see-saw (c) a well pulley (d) a flagpole
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
28. 28.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
29. 29.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
30. 30.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the same cup of coins
32. 32.🇮🇳 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
33. 33.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) yeast (c) a pencil (d) an empty thread reel
35. 35.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a small paper cup (c) a balloon (d) a mirror
37. 37.⚖️ 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
38. 38.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) True (b) False
40. 40.⚖️ 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

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