Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 379 · 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 crane uses a pulley. (a) False (b) True
2. 2.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
3. 3.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it can hurt your finger (d) it gets wet
4. 4.⚖️ 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
5. 5.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
6. 6.⚖️ 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
7. 7.⚖️ 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 measure it (b) we change it (c) we keep it the same
8. 8.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
9. 9.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
10. 10.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) a pencil (c) an empty thread reel (d) a small paper cup
11. 11.True or false: a bottle opener is a lever. (a) False (b) True
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) an empty thread reel (c) a pencil (d) coins as the load
13. 13.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
14. 14.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a balloon (c) a small paper cup (d) string
15. 15.⚖️ 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 lifting height (c) how hard we must pull
16. 16.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 10 cm (d) 40 cm
17. 17.⚖️ 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
18. 18.⚖️ 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
19. 19.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
20. 20.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
21. 21.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
22. 22.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) pulling down is easier (d) water gets lighter
23. 23.⚖️ 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 same cup of coins
24. 24.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
25. 25.⚙️ Which of these is a lever? (a) a ramp (b) a bottle opener (c) a slide (d) a crane
26. 26.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
27. 27.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it gets hot (d) it is magnetic
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) False (b) True
29. 29.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a mirror (d) a pencil
30. 30.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the blackboard (c) on the bench (d) on the flagpole
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) an empty thread reel (d) a battery cell
32. 32.⚙️ Which simple machine is a well pulley? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
33. 33.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
34. 34.⚙️ Which of these uses a pulley? (a) a see-saw (b) a tap handle (c) a slide (d) a flagpole
35. 35.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) the same (d) impossible
36. 36.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
37. 37.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
38. 38.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) halves the weight (d) changes pull direction
39. 39.⚖️ 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
40. 40.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed

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