Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 58 · 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.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) impossible (d) harder
2. 2.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) changes pull direction (d) makes it magnetic
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) rope (b) battery (c) magnet (d) nail
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) turmeric powder (d) string
6. 6.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
7. 7.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
8. 8.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
9. 9.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
10. 10.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a magnet (c) a small paper cup (d) a pencil
12. 12.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it could fall on you (d) it is magnetic
13. 13.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
14. 14.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) down (c) in a circle (d) up
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 measure it (b) we change it (c) we keep it the same
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a magnet (c) turmeric powder (d) an empty thread reel
17. 17.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
18. 18.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
19. 19.⚙️ Which of these is a lever? (a) a slide (b) a see-saw (c) a steering wheel (d) a ramp
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) True (b) False
21. 21.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a doorknob (c) a bottle opener (d) a see-saw
22. 22.True or false: string is needed for the thread-reel pulley. (a) False (b) True
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 measure it (b) we change it (c) we keep it the same
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a battery cell (c) coins as the load (d) a pencil
25. 25.⚖️ 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) number of pulleys (c) the lifting height (d) the same cup of coins
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
27. 27.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
28. 28.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
29. 29.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) a battery cell (d) a pencil
30. 30.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
31. 31.⚖️ 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
32. 32.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
33. 33.True or false: a doorknob is a lever. (a) False (b) True
34. 34.🛟 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
35. 35.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) a balloon (d) coins as the load
37. 37.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) zero (d) double
38. 38.True or false: a bottle opener is a lever. (a) True (b) False
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
40. 40.⚖️ 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 change it (c) we measure it

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