Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 619 · 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? What do we do with “number of pulleys”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) string (c) a battery cell (d) a magnet
3. 3.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
4. 4.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) nail (d) magnet
5. 5.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) zero (d) the same
6. 6.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the rope gets shorter (c) the bucket floats (d) water gets lighter
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) coins as the load (c) a battery cell (d) an empty thread reel
8. 8.🔮 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
9. 9.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
10. 10.⚙️ Which of these uses a pulley? (a) a see-saw (b) a flagpole (c) a crowbar (d) a ramp
11. 11.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a well pulley (c) a tap handle (d) a bottle opener
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a pencil (c) a balloon (d) a magnet
13. 13.⚙️ Which of these is a lever? (a) a flagpole (b) a crane (c) a crowbar (d) a steering wheel
14. 14.⚖️ 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 cup of coins (b) how hard we must pull (c) number of pulleys (d) the lifting height
15. 15.⚖️ 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
16. 16.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it gets hot (d) it is magnetic
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a battery cell (c) yeast (d) coins as the load
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) turmeric powder (c) coins as the load (d) an empty thread reel
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) a small paper cup (d) yeast
21. 21.⚙️ Which of these is a lever? (a) a sloping road (b) a well pulley (c) a slide (d) a see-saw
22. 22.True or false: a ramp is an inclined plane. (a) True (b) False
23. 23.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
25. 25.⚖️ 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 measure it (b) we change it (c) we keep it the same
26. 26.⚖️ 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
27. 27.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
28. 28.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
29. 29.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
30. 30.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) down (d) in a circle
31. 31.⚖️ 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 lifting height
32. 32.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
33. 33.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) a small paper cup (c) string (d) a pencil
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) True (b) False
37. 37.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
38. 38.⚙️ Which of these uses a pulley? (a) a crane (b) a bottle opener (c) a slide (d) a spoon lifting a lid
39. 39.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
40. 40.⚖️ 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

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