Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 629 · 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 see-saw? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
2. 2.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) a magnet (d) an empty thread reel
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.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it gets longer (d) it turns blue
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a balloon (c) a small paper cup (d) a pencil
7. 7.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) makes it magnetic (d) changes pull direction
8. 8.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a spoon lifting a lid (c) a slide (d) a see-saw
9. 9.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a steering wheel (c) a tap handle (d) a flagpole
10. 10.⚖️ 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 measure it (c) we change it
11. 11.⚖️ 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) the same cup of coins (c) the same string (d) number of pulleys
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) yeast (c) a pencil (d) turmeric powder
13. 13.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) string (c) a battery cell (d) a mirror
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) yeast (c) a balloon (d) a small paper cup
16. 16.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) a pencil (c) string (d) an empty thread reel
18. 18.⚖️ 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
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull
20. 20.⚖️ 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) the lifting height (c) how hard we must pull (d) the same cup of coins
21. 21.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) about half (d) double
22. 22.⚙️ Which simple machine is a doorknob? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
23. 23.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
24. 24.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
25. 25.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the bench (c) in the tap (d) on the flagpole
26. 26.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
27. 27.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
28. 28.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a sloping road (c) a see-saw (d) a crane
29. 29.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a magnet (c) a pencil (d) an empty thread reel
30. 30.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) yeast (c) turmeric powder (d) an empty thread reel
32. 32.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) a balloon (d) an empty thread reel
34. 34.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 5 cm (d) 40 cm
35. 35.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a ramp (c) a well pulley (d) a bottle opener
36. 36.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
37. 37.⚙️ Which of these is a lever? (a) a see-saw (b) a slide (c) a crane (d) a flagpole
38. 38.True or false: a pencil 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? What do we do with “the same cup of coins”? (a) we keep it the same (b) we change it (c) we measure it
40. 40.⚙️ Which simple machine is a tap handle? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle

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