Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 219 · 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.⚖️ 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 keep it the same (c) we change it
2. 2.True or false: a see-saw is an inclined plane. (a) False (b) True
3. 3.🧺 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) a pencil (d) a mirror
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull
5. 5.⚖️ 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
6. 6.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) the rope gets shorter (d) pulling down is easier
7. 7.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) yeast (c) a battery cell (d) a magnet
8. 8.⚖️ 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
9. 9.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) halves the weight (c) makes it magnetic (d) adds weight
10. 10.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) string (d) an empty thread reel
11. 11.🇮🇳 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
12. 12.⚖️ 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 string (b) number of pulleys (c) the lifting height (d) how hard we must pull
13. 13.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
14. 14.⚖️ 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
15. 15.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) the same (d) zero
16. 16.True or false: a doorknob is a wheel and axle. (a) True (b) False
17. 17.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
18. 18.⚖️ 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
19. 19.🛟 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
20. 20.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
21. 21.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) the same (d) easier
22. 22.⚙️ Which simple machine is a crane? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a mirror (c) a small paper cup (d) an empty thread reel
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) an empty thread reel (c) a pencil (d) a small paper cup
26. 26.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it can hurt your finger (d) it gets longer
27. 27.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) sideways (c) in a circle (d) up
28. 28.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
29. 29.⚙️ Which of these uses a pulley? (a) a crowbar (b) a spoon lifting a lid (c) a see-saw (d) a well pulley
30. 30.True or false: a tap handle is a wheel and axle. (a) True (b) False
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a small paper cup (c) a magnet (d) string
32. 32.⚙️ Which of these is an inclined plane? (a) a slide (b) a bottle opener (c) a crowbar (d) a flagpole
33. 33.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
34. 34.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
35. 35.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
36. 36.⚙️ Which simple machine is a ramp? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
37. 37.⚖️ 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
38. 38.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a ramp (c) a bottle opener (d) a spoon lifting a lid
39. 39.True or false: a see-saw uses a pulley. (a) True (b) False
40. 40.⚖️ 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

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