Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 396 · 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.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) sideways (c) up (d) in a circle
2. 2.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it can hurt your finger (d) it gets wet
3. 3.True or false: a crane is a wheel and axle. (a) False (b) True
4. 4.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it is magnetic (d) it gets hot
5. 5.⚙️ Which of these uses a pulley? (a) a tap handle (b) a spoon lifting a lid (c) a crowbar (d) a well pulley
6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) coins as the load (c) a balloon (d) an empty thread reel
7. 7.🧺 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) yeast (d) a pencil
8. 8.⚙️ Which simple machine is a flagpole? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) the lifting height (c) how hard we must pull (d) the same cup of coins
10. 10.⚙️ Which simple machine is a crowbar? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
11. 11.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) easier (d) harder
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a magnet (c) coins as the load (d) string
13. 13.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a tap handle (c) a flagpole (d) a well pulley
14. 14.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
15. 15.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 40 cm (d) 20 cm
16. 16.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
17. 17.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) the bucket floats (d) pulling down is easier
18. 18.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
19. 19.True or false: a crane is a lever. (a) False (b) True
20. 20.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) a battery cell (d) string
22. 22.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) False (b) True
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
25. 25.⚙️ Which of these uses a pulley? (a) a ramp (b) a doorknob (c) a spoon lifting a lid (d) a crane
26. 26.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
27. 27.⚖️ 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 change it (c) we measure it
28. 28.⚖️ 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 change it (c) we keep it the same
29. 29.⚙️ Which simple machine is a ramp? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
30. 30.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
31. 31.⚙️ Which of these uses a pulley? (a) a see-saw (b) a crowbar (c) a flagpole (d) a spoon lifting a lid
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) a small paper cup (d) turmeric powder
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) an empty thread reel (c) a balloon (d) a magnet
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) turmeric powder (d) string
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) a small paper cup (d) a mirror
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the lifting height (b) number of pulleys (c) how hard we must pull
37. 37.⚖️ 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
38. 38.True or false: a slide is a lever. (a) False (b) True
39. 39.⚖️ 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 change it (b) we measure it (c) we keep it the same
40. 40.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed

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