Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 882 · 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.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the bucket floats (c) the rope gets shorter (d) water gets lighter
2. 2.⚖️ 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
3. 3.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets longer (d) it gets wet
4. 4.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
5. 5.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 40 cm (d) 5 cm
6. 6.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a slide (c) a doorknob (d) a sloping road
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) False (b) True
8. 8.🧺 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 magnet
9. 9.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) how hard we must pull (c) number of pulleys
11. 11.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) coins as the load (c) a small paper cup (d) an empty thread reel
12. 12.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
13. 13.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
14. 14.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) a pencil (c) an empty thread reel (d) coins as the load
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a battery cell (c) an empty thread reel (d) a pencil
17. 17.⚖️ 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
18. 18.🧺 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 balloon (d) coins as the load
19. 19.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
20. 20.⚙️ Which of these is a lever? (a) a crane (b) a spoon lifting a lid (c) a steering wheel (d) a ramp
21. 21.⚖️ 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 lifting height (c) number of pulleys
22. 22.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) string (c) yeast (d) a balloon
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a magnet (c) a balloon (d) a pencil
24. 24.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
25. 25.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) down (d) sideways
26. 26.True or false: a ramp is a lever. (a) False (b) True
27. 27.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
28. 28.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we keep it the same (c) we measure it
30. 30.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) rope (c) battery (d) magnet
31. 31.True or false: a steering wheel is a lever. (a) False (b) True
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a mirror (c) a balloon (d) an empty thread reel
33. 33.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
34. 34.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it could fall on you (d) it might sing
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) turmeric powder (c) coins as the load (d) a pencil
36. 36.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a see-saw (c) a crane (d) a flagpole
37. 37.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
38. 38.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) the same string (c) number of pulleys (d) the lifting height
40. 40.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) makes it magnetic (c) adds weight (d) halves the weight

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