Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 794 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a mirror (c) coins as the load (d) string
2. 2.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 10 cm (d) 40 cm
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a mirror (c) yeast (d) an empty thread reel
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we keep it the same (c) we change it
6. 6.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
7. 7.⚙️ Which of these is a wheel and axle? (a) a slide (b) a ramp (c) a spoon lifting a lid (d) a steering wheel
8. 8.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) impossible (d) the same
9. 9.True or false: a steering wheel is a wheel and axle. (a) True (b) False
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) an empty thread reel (d) yeast
11. 11.⚖️ 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) False (b) True
12. 12.⚙️ Which simple machine is a sloping road? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
13. 13.True or false: a see-saw is a lever. (a) False (b) True
14. 14.🛟 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
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) string (c) turmeric powder (d) a battery cell
16. 16.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
17. 17.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a tap handle (c) a crane (d) a bottle opener
18. 18.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) the same cup of coins (c) how hard we must pull (d) the same string
20. 20.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
21. 21.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
22. 22.⚖️ 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
23. 23.⚖️ 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
24. 24.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it might sing (d) it could fall on you
25. 25.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
26. 26.⚖️ 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
27. 27.⚙️ Which simple machine is a well pulley? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
28. 28.⚖️ 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 string (c) number of pulleys
29. 29.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
30. 30.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) an empty thread reel (c) a small paper cup (d) coins as the load
32. 32.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
33. 33.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
34. 34.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) halves the weight (d) changes pull direction
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) False (b) True
36. 36.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) True (b) False
38. 38.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
39. 39.⚙️ Which of these is a lever? (a) a doorknob (b) a tap handle (c) a slide (d) a crowbar
40. 40.⚙️ Which of these is a lever? (a) a flagpole (b) a steering wheel (c) a see-saw (d) a crane

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