Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 115 · 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.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a battery cell (c) a balloon (d) a pencil
3. 3.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it is magnetic (d) it gets hot
4. 4.⚖️ 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
5. 5.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) how hard we must pull (c) the lifting height (d) the same cup of coins
7. 7.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
8. 8.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
9. 9.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
10. 10.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a tap handle (c) a crane (d) a well pulley
11. 11.⚖️ 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
12. 12.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a balloon (c) coins as the load (d) a pencil
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
15. 15.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we keep it the same (c) we measure it
17. 17.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
18. 18.⚖️ 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
19. 19.⚖️ 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
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we measure it (c) we change it
21. 21.True or false: a bottle opener is a lever. (a) False (b) True
22. 22.True or false: a crane is an inclined plane. (a) True (b) False
23. 23.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
24. 24.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it gets wet (d) it can hurt your finger
25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) yeast (c) string (d) a magnet
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) a pencil (d) turmeric powder
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) turmeric powder (d) coins as the load
28. 28.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
29. 29.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
30. 30.⚖️ 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 change it (c) we keep it the same
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a magnet (c) a small paper cup (d) an empty thread reel
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a balloon (c) a battery cell (d) an empty thread reel
33. 33.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
34. 34.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) a magnet (d) an empty thread reel
36. 36.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the flagpole (c) in the tap (d) on the blackboard
37. 37.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
38. 38.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) yeast (d) a small paper cup
40. 40.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a spoon lifting a lid (c) a slide (d) a see-saw

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