Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 928 · 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.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a well pulley (c) a bottle opener (d) a see-saw
2. 2.⚖️ 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 measure it (c) we change it
3. 3.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
4. 4.⚖️ 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
5. 5.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) pulling down is easier (c) the rope gets shorter (d) the bucket floats
6. 6.⚖️ 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
7. 7.True or false: a slide uses a pulley. (a) False (b) True
8. 8.True or false: a crowbar is a lever. (a) True (b) False
9. 9.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a bottle opener (c) a ramp (d) a doorknob
10. 10.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) coins as the load (c) a small paper cup (d) string
12. 12.True or false: a sloping road is a wheel and axle. (a) True (b) False
13. 13.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) about half (d) zero
14. 14.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) turmeric powder (c) yeast (d) an empty thread reel
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) an empty thread reel (d) a magnet
17. 17.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) sideways (c) up (d) down
18. 18.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
19. 19.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
20. 20.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) magnet (c) nail (d) battery
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) yeast (c) a pencil (d) an empty thread reel
22. 22.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets wet (d) it gets longer
23. 23.True or false: a bottle opener is a lever. (a) False (b) True
24. 24.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
25. 25.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a crowbar (c) a spoon lifting a lid (d) a well pulley
26. 26.⚖️ 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 measure it (c) we change it
27. 27.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it is magnetic (d) it might sing
28. 28.🔮 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
29. 29.⚙️ Which of these uses a pulley? (a) a flagpole (b) a ramp (c) a bottle opener (d) a doorknob
30. 30.⚖️ 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) number of pulleys (d) how hard we must pull
31. 31.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
32. 32.⚖️ 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
33. 33.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) string (d) turmeric powder
35. 35.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) the same (d) easier
36. 36.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
37. 37.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
38. 38.⚖️ 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) the same cup of coins (c) the same string (d) number of pulleys
39. 39.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
40. 40.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True

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