Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 679 · 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.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) the same (d) harder
2. 2.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) turmeric powder (c) an empty thread reel (d) a magnet
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a magnet (c) a balloon (d) a mirror
5. 5.⚙️ Which simple machine is a crowbar? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
6. 6.True or false: a ramp is an inclined plane. (a) True (b) False
7. 7.⚖️ 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 measure it (b) we keep it the same (c) we change it
8. 8.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
10. 10.True or false: a slide is an inclined plane. (a) False (b) True
11. 11.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a magnet (c) a pencil (d) string
13. 13.⚙️ Which of these is a lever? (a) a flagpole (b) a well pulley (c) a slide (d) a bottle opener
14. 14.⚖️ 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 change it (c) we keep it the same
15. 15.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) zero (d) about half
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) number of pulleys (c) the same string (d) how hard we must pull
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a doorknob (c) a see-saw (d) a steering wheel
20. 20.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
21. 21.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
22. 22.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the blackboard (c) on the bench (d) in the tap
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we measure it (c) we keep it the same
24. 24.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) pulling down is easier (d) the rope gets shorter
25. 25.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
26. 26.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a ramp (c) a doorknob (d) a see-saw
27. 27.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
28. 28.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
29. 29.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) turmeric powder (d) coins as the load
30. 30.True or false: a ramp uses a pulley. (a) True (b) False
31. 31.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
32. 32.⚖️ 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
33. 33.⚖️ 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
34. 34.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) makes it magnetic (d) changes pull direction
35. 35.⚙️ Which simple machine is a doorknob? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
36. 36.⚙️ Which of these uses a pulley? (a) a well pulley (b) a spoon lifting a lid (c) a crowbar (d) a tap handle
37. 37.⚙️ Which of these is a lever? (a) a steering wheel (b) a doorknob (c) a see-saw (d) a flagpole
38. 38.⚖️ 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
39. 39.True or false: a see-saw is a lever. (a) False (b) True
40. 40.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it could fall on you (d) it is magnetic

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