Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 983 · 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.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
2. 2.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it might sing (d) it is magnetic
3. 3.⚙️ Which of these is a lever? (a) a flagpole (b) a bottle opener (c) a well pulley (d) a ramp
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) a small paper cup (c) an empty thread reel (d) string
5. 5.🧺 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) yeast (d) a pencil
6. 6.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
7. 7.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
8. 8.⚙️ Which simple machine is a sloping road? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
9. 9.⚖️ 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
10. 10.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) the bucket floats (c) water gets lighter (d) pulling down is easier
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
12. 12.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
13. 13.⚙️ Which simple machine is a crane? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
14. 14.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it can hurt your finger (d) it gets wet
15. 15.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 5 cm (d) 10 cm
16. 16.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
17. 17.True or false: a bottle opener is a wheel and axle. (a) False (b) True
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a balloon (c) yeast (d) a magnet
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we keep it the same (c) we measure it
21. 21.True or false: a tap handle is a wheel and axle. (a) False (b) True
22. 22.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) harder (d) impossible
23. 23.⚖️ 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) how hard we must pull (c) number of pulleys
24. 24.⚖️ 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
25. 25.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
26. 26.⚙️ Which simple machine is a ramp? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) yeast (c) a pencil (d) turmeric powder
28. 28.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) nail (c) battery (d) rope
29. 29.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a magnet (c) a pencil (d) coins as the load
30. 30.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a battery cell (c) coins as the load (d) a small paper cup
31. 31.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
32. 32.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) the same (d) zero
33. 33.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
34. 34.True or false: a ramp uses a pulley. (a) True (b) False
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) turmeric powder (c) a pencil (d) an empty thread reel
36. 36.⚖️ 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) the same string (c) the same cup of coins (d) how hard we must pull
37. 37.True or false: a steering wheel is a wheel and axle. (a) True (b) False
38. 38.⚖️ 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
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 keep it the same (b) we change it (c) we measure it
40. 40.True or false: a sloping road is an inclined plane. (a) False (b) True

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