Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 105 · 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? True or false: the same cup of coins is what we measure. (a) False (b) True
2. 2.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
3. 3.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
4. 4.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
5. 5.⚖️ 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 same string
6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) string (d) a mirror
7. 7.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
8. 8.⚙️ Which of these is an inclined plane? (a) a slide (b) a steering wheel (c) a bottle opener (d) a well 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 same cup of coins (c) how hard we must pull (d) number of pulleys
10. 10.⚖️ 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) number of pulleys (c) the same cup of coins
11. 11.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) a battery cell (d) a pencil
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) True (b) False
13. 13.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
14. 14.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it can hurt your finger (d) it turns blue
15. 15.⚖️ 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 keep it the same (b) we change it (c) we measure it
16. 16.🧺 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 battery cell (d) coins as the load
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) coins as the load (c) a mirror (d) a magnet
18. 18.True or false: a see-saw is a lever. (a) True (b) False
19. 19.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) the same (d) easier
20. 20.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
21. 21.⚖️ 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 keep it the same (c) we change it
22. 22.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
23. 23.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
24. 24.⚖️ 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
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) an empty thread reel (d) turmeric powder
26. 26.True or false: a slide is an inclined plane. (a) True (b) False
27. 27.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) sideways (c) down (d) up
28. 28.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
29. 29.True or false: a flagpole is a lever. (a) False (b) True
30. 30.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) yeast (d) a small paper cup
31. 31.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
32. 32.⚙️ Which of these uses a pulley? (a) a crowbar (b) a spoon lifting a lid (c) a sloping road (d) a well pulley
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) an empty thread reel (d) a magnet
34. 34.⚙️ Which of these uses a pulley? (a) a sloping road (b) a tap handle (c) a see-saw (d) a crane
35. 35.⚖️ 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
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) turmeric powder (d) an empty thread reel
37. 37.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) water gets lighter (d) pulling down is easier
38. 38.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) halves the weight (c) adds weight (d) makes it magnetic
39. 39.⚖️ 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) the lifting height (c) number of pulleys (d) the same cup of coins
40. 40.True or false: a tap handle is a wheel and axle. (a) False (b) True

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