Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 840 · 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 a pencil for the thread-reel pulley? (a) not needed (b) needed
2. 2.⚙️ Which simple machine is a flagpole? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
3. 3.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
4. 4.⚙️ Which of these is an inclined plane? (a) a crane (b) a bottle opener (c) a sloping road (d) a doorknob
5. 5.🛟 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
6. 6.⚖️ 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
7. 7.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) coins as the load (c) string (d) a pencil
9. 9.⚙️ Which of these is a lever? (a) a tap handle (b) a ramp (c) a well pulley (d) a crowbar
10. 10.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
11. 11.⚙️ Which of these is a lever? (a) a crane (b) a ramp (c) a slide (d) a bottle opener
12. 12.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a flagpole (c) a bottle opener (d) a steering wheel
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) the same string (c) how hard we must pull
14. 14.⚖️ 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 change it (c) we measure it
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a balloon (c) yeast (d) an empty thread reel
16. 16.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a balloon (c) turmeric powder (d) coins as the load
18. 18.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 10 cm (d) 5 cm
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) yeast (d) coins as the load
20. 20.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) down (c) up (d) sideways
21. 21.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
22. 22.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
23. 23.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) adds weight (d) makes it magnetic
24. 24.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) zero (d) about half
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a balloon (c) a pencil (d) an empty thread reel
26. 26.⚖️ 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
27. 27.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
28. 28.⚖️ 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) False (b) True
29. 29.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a small paper cup (c) a battery cell (d) an empty thread reel
31. 31.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
32. 32.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
33. 33.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
34. 34.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it could fall on you (d) it gets hot
35. 35.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) impossible (d) harder
36. 36.⚖️ 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
37. 37.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) nail (d) rope
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) string (d) a magnet
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) an empty thread reel (d) a mirror
40. 40.⚖️ 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

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