Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 371 · 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 crowbar is a lever. (a) False (b) True
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) a pencil (c) string (d) an empty thread reel
3. 3.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it turns blue (d) it can hurt your finger
4. 4.⚖️ 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) how hard we must pull (c) the lifting height (d) the same cup of coins
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) a pencil (d) a battery cell
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) turmeric powder (d) string
7. 7.🧺 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) a mirror (d) string
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) turmeric powder (c) a balloon (d) a mirror
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) a balloon (d) an empty thread reel
10. 10.⚙️ Which of these uses a pulley? (a) a well pulley (b) a slide (c) a steering wheel (d) a see-saw
11. 11.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it is magnetic (d) it could fall on you
12. 12.⚖️ 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) False (b) True
13. 13.⚖️ 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 change it (b) we measure it (c) we keep it the same
14. 14.⚙️ Which simple machine is a ramp? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
15. 15.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) about half (d) double
16. 16.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
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) the same cup of coins (b) number of pulleys (c) how hard we must pull (d) the lifting height
18. 18.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
19. 19.True or false: a well pulley is a lever. (a) False (b) True
20. 20.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) coins as the load (d) a battery cell
21. 21.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the bench (c) in the tap (d) on the blackboard
22. 22.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
23. 23.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) the same (d) harder
24. 24.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
25. 25.⚙️ Which simple machine is a crane? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
26. 26.True or false: a flagpole uses a pulley. (a) True (b) False
27. 27.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a flagpole (c) a spoon lifting a lid (d) a sloping road
28. 28.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a flagpole (c) a ramp (d) a well pulley
29. 29.⚖️ 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
30. 30.⚙️ Which of these is a lever? (a) a slide (b) a spoon lifting a lid (c) a steering wheel (d) a sloping road
31. 31.⚖️ 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
32. 32.⚖️ 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
33. 33.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a mirror (c) yeast (d) an empty thread reel
35. 35.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) pulling down is easier (c) the bucket floats (d) the rope gets shorter
36. 36.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
37. 37.True or false: a steering wheel is a wheel and axle. (a) False (b) True
38. 38.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 20 cm (d) 40 cm
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) yeast (c) turmeric powder (d) a magnet
40. 40.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True

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