Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 419 · 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.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
2. 2.🛟 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
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) a small paper cup (c) string (d) a pencil
4. 4.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) a pencil (d) yeast
6. 6.⚖️ 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 same cup of coins (c) number of pulleys
7. 7.⚖️ 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) False (b) True
8. 8.⚙️ Which of these uses a pulley? (a) a well pulley (b) a crowbar (c) a ramp (d) a doorknob
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) string (d) a mirror
10. 10.🛟 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
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) coins as the load (d) a balloon
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we measure it (c) we change it
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.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) coins as the load (c) a pencil (d) turmeric powder
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a battery cell (c) a mirror (d) string
16. 16.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
17. 17.⚖️ 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 measure it (c) we keep it the same
18. 18.⚖️ 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
19. 19.True or false: a doorknob is a wheel and axle. (a) True (b) False
20. 20.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
21. 21.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
22. 22.⚖️ 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) number of pulleys (c) the same cup of coins (d) the same string
23. 23.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
24. 24.⚖️ 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) number of pulleys (c) how hard we must pull
25. 25.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
26. 26.⚖️ 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) True (b) False
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) a balloon (d) a pencil
28. 28.True or false: a sloping road uses a pulley. (a) True (b) False
29. 29.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) rope (c) battery (d) magnet
30. 30.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
31. 31.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
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) how hard we must pull (b) the same string (c) number of pulleys (d) the same cup of coins
33. 33.⚙️ Which of these is a lever? (a) a bottle opener (b) a crane (c) a tap handle (d) a well pulley
34. 34.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
35. 35.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) the bucket floats (c) pulling down is easier (d) water gets lighter
36. 36.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 40 cm (d) 20 cm
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
38. 38.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
39. 39.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
40. 40.⚖️ 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 measure it (c) we keep it the same

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