Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 834 · 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 of these is needed for the thread-reel pulley? (a) a balloon (b) a battery cell (c) yeast (d) a pencil
2. 2.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) harder (d) impossible
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a mirror (d) an empty thread reel
4. 4.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
5. 5.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a slide (c) a see-saw (d) a crowbar
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) an empty thread reel (d) a magnet
7. 7.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) nail (d) magnet
8. 8.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
9. 9.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) string (c) a pencil (d) an empty thread reel
11. 11.⚙️ Which simple machine is a crowbar? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
12. 12.True or false: a doorknob is an inclined plane. (a) True (b) False
13. 13.True or false: a well pulley is an inclined plane. (a) True (b) False
14. 14.⚖️ 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
15. 15.⚖️ 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
16. 16.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it is magnetic (d) it could fall on you
17. 17.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a well pulley (c) a slide (d) a crowbar
18. 18.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
19. 19.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a ramp (c) a flagpole (d) a spoon lifting a lid
20. 20.⚖️ 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 change it (b) we keep it the same (c) we measure it
21. 21.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
22. 22.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) changes pull direction (d) makes it magnetic
23. 23.⚖️ 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
24. 24.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 10 cm (d) 20 cm
25. 25.True or false: string is needed for the thread-reel pulley. (a) True (b) False
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we keep it the same (c) we change it
27. 27.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
28. 28.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
29. 29.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) how hard we must pull (c) number of pulleys (d) the same cup of coins
31. 31.True or false: a spoon lifting a lid is a wheel and axle. (a) True (b) False
32. 32.⚙️ Which of these uses a pulley? (a) a flagpole (b) a see-saw (c) a slide (d) a crowbar
33. 33.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
35. 35.⚖️ 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
36. 36.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
37. 37.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) an empty thread reel (c) a mirror (d) turmeric powder
38. 38.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) pulling down is easier (d) the bucket floats
39. 39.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it can hurt your finger (d) it turns blue
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a balloon (c) yeast (d) coins as the load

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