Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 298 · 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? Which of these is what we measure? (a) the same cup of coins (b) the lifting height (c) how hard we must pull (d) the same string
2. 2.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) down (d) up
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) turmeric powder (c) an empty thread reel (d) string
4. 4.🏗️ 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
5. 5.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it turns blue (d) it gets wet
6. 6.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
7. 7.⚖️ 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) True (b) False
8. 8.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
9. 9.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
10. 10.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) halves the weight (c) changes pull direction (d) adds weight
11. 11.⚖️ 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) True (b) False
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a balloon (c) a battery cell (d) a magnet
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) yeast (c) a mirror (d) an empty thread reel
14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a pencil (c) a mirror (d) a magnet
15. 15.🛟 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
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a mirror (c) a small paper cup (d) an empty thread reel
17. 17.True or false: a well pulley is a wheel and axle. (a) False (b) True
18. 18.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 5 cm (d) 40 cm
19. 19.⚖️ 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
20. 20.⚖️ 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
21. 21.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
22. 22.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) a pencil (c) string (d) coins as the load
24. 24.True or false: a sloping road is an inclined plane. (a) True (b) False
25. 25.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
26. 26.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
27. 27.True or false: a tap handle is a wheel and axle. (a) False (b) True
28. 28.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) nail (d) rope
29. 29.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
30. 30.⚖️ 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 keep it the same (b) we measure it (c) we change it
31. 31.⚙️ Which of these is a lever? (a) a slide (b) a flagpole (c) a ramp (d) a spoon lifting a lid
32. 32.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
33. 33.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) string (d) a balloon
35. 35.True or false: a bottle opener is an inclined plane. (a) True (b) False
36. 36.⚖️ 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 cup of coins
37. 37.⚖️ 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) False (b) True
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) a battery cell (d) a small paper cup
39. 39.True or false: a see-saw is a lever. (a) False (b) True
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) how hard we must pull (c) the same string (d) the same cup of coins

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