Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 213 · 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 an inclined plane? (a) a tap handle (b) a slide (c) a bottle opener (d) a steering wheel
2. 2.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 40 cm (d) 20 cm
3. 3.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) the same (d) zero
4. 4.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
5. 5.⚙️ Which of these is a lever? (a) a ramp (b) a crane (c) a well pulley (d) a see-saw
6. 6.⚖️ 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
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) coins as the load (d) a magnet
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) a pencil (c) coins as the load (d) an empty thread reel
9. 9.⚖️ 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
10. 10.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) the same (d) impossible
11. 11.⚖️ 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 measure it (b) we change it (c) we keep it the same
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same cup of coins (b) the lifting height (c) the same string (d) number of pulleys
13. 13.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it is magnetic (d) it could fall on you
14. 14.⚖️ 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 change it (c) we measure it
15. 15.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
16. 16.⚖️ 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
17. 17.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
18. 18.🧺 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) string (d) an empty thread reel
19. 19.⚙️ Which of these uses a pulley? (a) a see-saw (b) a bottle opener (c) a crane (d) a crowbar
20. 20.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) down (d) in a circle
21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) turmeric powder (d) coins as the load
22. 22.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
23. 23.⚙️ Which of these is a wheel and axle? (a) a slide (b) a see-saw (c) a steering wheel (d) a crowbar
24. 24.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) rope (c) magnet (d) battery
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) an empty thread reel (d) a magnet
26. 26.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a balloon (d) a small paper cup
28. 28.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
29. 29.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
30. 30.⚖️ 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 measure it (b) we keep it the same (c) we change it
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) a pencil (c) an empty thread reel (d) a small paper cup
32. 32.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
33. 33.⚙️ Which of these is a lever? (a) a slide (b) a tap handle (c) a spoon lifting a lid (d) a doorknob
34. 34.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
35. 35.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
36. 36.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
37. 37.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
39. 39.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets longer (d) it gets wet
40. 40.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed

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