Pulley STEM Project Worksheet

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

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