Pulley STEM Project Worksheet

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

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