Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 786 · 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.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) True (b) False
2. 2.True or false: a bottle opener is an inclined plane. (a) False (b) True
3. 3.True or false: a well pulley is a lever. (a) True (b) False
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) coins as the load (c) an empty thread reel (d) a pencil
5. 5.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) in the tap (c) on the flagpole (d) on the bench
6. 6.⚙️ Which of these uses a pulley? (a) a doorknob (b) a well pulley (c) a crowbar (d) a ramp
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 needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) a mirror (d) a pencil
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) a magnet (d) an empty thread reel
10. 10.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
11. 11.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
12. 12.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it might sing (d) it gets hot
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a pencil (c) an empty thread reel (d) turmeric powder
14. 14.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) a magnet (d) an empty thread reel
15. 15.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a doorknob (c) a flagpole (d) a sloping road
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a mirror (c) a small paper cup (d) string
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) the lifting height (c) how hard we must pull (d) the same cup of coins
18. 18.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
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 keep it the same (b) we measure it (c) we change it
20. 20.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
21. 21.⚖️ 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) False (b) True
22. 22.True or false: a ramp is an inclined plane. (a) False (b) True
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull (d) the lifting height
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) a small paper cup (c) string (d) a pencil
25. 25.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 10 cm (c) 5 cm (d) 40 cm
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a battery cell (c) a pencil (d) coins as the load
27. 27.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it gets longer (d) it can hurt your finger
28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a magnet (c) yeast (d) an empty thread reel
29. 29.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
30. 30.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) coins as the load (c) string (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.⚖️ 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) how hard we must pull (c) number of pulleys
33. 33.⚙️ Which of these is a lever? (a) a slide (b) a well pulley (c) a sloping road (d) a spoon lifting a lid
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a pencil (c) string (d) a balloon
35. 35.⚖️ 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
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a mirror (c) a battery cell (d) yeast
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
38. 38.⚖️ 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 lifting height
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a balloon (c) a small paper cup (d) a mirror
40. 40.⚖️ 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

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