Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 795 · 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 of these is an inclined plane? (a) a tap handle (b) a spoon lifting a lid (c) a slide (d) a doorknob
2. 2.⚖️ 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) True (b) False
3. 3.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) an empty thread reel (c) a pencil (d) string
5. 5.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a see-saw (c) a spoon lifting a lid (d) a well pulley
6. 6.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) down (d) up
7. 7.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
8. 8.⚙️ Which of these is a lever? (a) a sloping road (b) a see-saw (c) a steering wheel (d) a ramp
9. 9.⚖️ 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
10. 10.⚙️ Which of these is a lever? (a) a slide (b) a crane (c) a bottle opener (d) a ramp
11. 11.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
12. 12.⚖️ 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 measure it (c) we change it
13. 13.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) the same (d) double
14. 14.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
15. 15.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
16. 16.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
17. 17.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
18. 18.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the bench (c) on the flagpole (d) on the blackboard
19. 19.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it turns blue (c) it gets wet (d) it gets longer
20. 20.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it gets hot (d) it might sing
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a battery cell (c) coins as the load (d) a small paper cup
22. 22.True or false: a doorknob is a lever. (a) False (b) True
23. 23.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a magnet (c) a small paper cup (d) an empty thread reel
24. 24.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
25. 25.⚖️ 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
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) turmeric powder (d) string
27. 27.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) changes pull direction (d) makes it magnetic
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) coins as the load (c) an empty thread reel (d) a small paper cup
29. 29.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) the same (d) easier
30. 30.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) the lifting height (c) the same cup of coins (d) number of pulleys
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) the same string (c) how hard we must pull
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) turmeric powder (c) yeast (d) coins as the load
34. 34.True or false: a crowbar uses a pulley. (a) False (b) True
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we measure it (c) we keep it the same
36. 36.⚖️ 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) False (b) True
37. 37.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a balloon (c) turmeric powder (d) a small paper cup
39. 39.⚖️ 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
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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