Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 256 · 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? True or false: the same string is what we measure. (a) True (b) False
2. 2.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
3. 3.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it turns blue (d) it can hurt your finger
4. 4.⚖️ 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
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a mirror (c) string (d) a balloon
6. 6.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) harder (d) easier
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we measure it (c) we change it
8. 8.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) rope (c) battery (d) nail
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) how hard we must pull (c) number of pulleys (d) the same cup of coins
10. 10.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) down (d) up
11. 11.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
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.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) zero (d) about half
14. 14.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) a magnet (d) a pencil
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) yeast (c) a magnet (d) a small paper cup
16. 16.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
17. 17.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) the lifting height (c) the same string (d) how hard we must pull
19. 19.⚙️ Which simple machine is a see-saw? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
21. 21.True or false: a bottle opener is a lever. (a) False (b) True
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) yeast (c) an empty thread reel (d) a pencil
23. 23.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) string (c) a small paper cup (d) coins as the load
25. 25.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
26. 26.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the flagpole (c) in the tap (d) on the bench
27. 27.True or false: a well pulley uses a pulley. (a) False (b) True
28. 28.True or false: a see-saw is an inclined plane. (a) False (b) True
29. 29.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) a small paper cup (c) coins as the load (d) an empty thread reel
30. 30.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it could fall on you (d) it might sing
31. 31.⚖️ 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
32. 32.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
33. 33.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
34. 34.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
35. 35.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a slide (c) a bottle opener (d) a crane
36. 36.True or false: a slide is a wheel and axle. (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) False (b) True
38. 38.⚖️ 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
39. 39.⚖️ 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 keep it the same (b) we change it (c) we measure it
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) False (b) True

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