Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 573 · 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.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
2. 2.⚖️ 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
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) an empty thread reel (c) a mirror (d) a magnet
4. 4.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
5. 5.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
6. 6.⚖️ 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) number of pulleys (c) the same string (d) the same cup of coins
7. 7.⚖️ 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 measure it (c) we change it
8. 8.True or false: a bottle opener is a lever. (a) True (b) False
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) the same cup of coins (c) number of pulleys (d) how hard we must pull
10. 10.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
11. 11.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) the rope gets shorter (d) pulling down is easier
12. 12.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a tap handle (c) a bottle opener (d) a see-saw
13. 13.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
14. 14.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
15. 15.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) a small paper cup (d) a magnet
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a balloon (c) a mirror (d) a pencil
18. 18.⚖️ 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
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a mirror (c) an empty thread reel (d) string
20. 20.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a battery cell (c) turmeric powder (d) a mirror
22. 22.⚙️ Which simple machine is a crane? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
23. 23.⚙️ Which of these is a lever? (a) a doorknob (b) a crane (c) a well pulley (d) a crowbar
24. 24.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
25. 25.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
26. 26.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it is magnetic (d) it gets hot
27. 27.True or false: a flagpole is a wheel and axle. (a) False (b) True
28. 28.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 5 cm (d) 10 cm
29. 29.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) rope (d) nail
30. 30.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
31. 31.⚖️ 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 change it (b) we keep it the same (c) we measure it
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same string (b) number of pulleys (c) how hard we must pull
33. 33.⚖️ 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
34. 34.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a crowbar (c) a well pulley (d) a doorknob
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) turmeric powder (c) an empty thread reel (d) a pencil
36. 36.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
37. 37.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) down (c) up (d) in a circle
38. 38.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) coins as the load (d) a mirror
40. 40.⚖️ 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) number of pulleys (c) the same cup of coins

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