Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 799 · 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.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
2. 2.⚖️ 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) how hard we must pull (c) the lifting height
3. 3.⚖️ 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
4. 4.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
5. 5.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
6. 6.⚖️ 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 same cup of coins (c) number of pulleys
7. 7.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) coins as the load (c) turmeric powder (d) a balloon
9. 9.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) the same (d) zero
10. 10.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
11. 11.⚙️ Which of these uses a pulley? (a) a flagpole (b) a doorknob (c) a crowbar (d) a spoon lifting a lid
12. 12.⚖️ 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) False (b) True
13. 13.⚙️ Which of these is a lever? (a) a doorknob (b) a well pulley (c) a steering wheel (d) a see-saw
14. 14.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
15. 15.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we change it (c) we measure it
17. 17.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
18. 18.⚖️ 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 same string (c) how hard we must pull
19. 19.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) in a circle (c) sideways (d) down
20. 20.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
21. 21.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it could fall on you (c) it might sing (d) it is magnetic
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
23. 23.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
24. 24.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 20 cm (d) 10 cm
25. 25.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
26. 26.⚖️ 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 keep it the same (c) we measure it
27. 27.True or false: a crowbar uses a pulley. (a) False (b) True
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
29. 29.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a magnet (c) an empty thread reel (d) string
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) a pencil (d) turmeric powder
32. 32.⚙️ Which simple machine is a ramp? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
33. 33.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
34. 34.🏗️ 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
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) a pencil (d) a balloon
36. 36.True or false: a see-saw is a lever. (a) False (b) True
37. 37.True or false: a balloon is not 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) halves the weight (c) adds weight (d) changes pull direction
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) coins as the load (c) a small paper cup (d) string
40. 40.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed

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