Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 464 · 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? Which of these is the one thing we change? (a) the same cup of coins (b) number of pulleys (c) the lifting height (d) the same string
2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) a battery cell (d) coins as the load
3. 3.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it gets hot (d) it could fall on you
4. 4.⚙️ Which of these is a lever? (a) a sloping road (b) a steering wheel (c) a crowbar (d) a tap handle
5. 5.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
6. 6.⚙️ Which simple machine is a tap handle? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
7. 7.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
8. 8.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
9. 9.⚖️ 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
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) the lifting height (c) the same string (d) number of pulleys
11. 11.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 10 cm (d) 20 cm
12. 12.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) double (d) about half
13. 13.⚖️ 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) True (b) False
14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a balloon (c) a mirror (d) a battery cell
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a pencil (c) a balloon (d) an empty thread reel
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) an empty thread reel (c) string (d) coins as the load
18. 18.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a battery cell (c) coins as the load (d) an empty thread reel
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) an empty thread reel (d) a balloon
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we measure it (c) we keep it the same
22. 22.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets wet (c) it gets longer (d) it turns blue
23. 23.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
24. 24.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) turmeric powder (c) a pencil (d) a small paper cup
26. 26.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
27. 27.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) sideways (c) down (d) up
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
29. 29.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
30. 30.True or false: a well pulley uses a pulley. (a) True (b) False
31. 31.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a spoon lifting a lid (c) a crowbar (d) a see-saw
32. 32.⚙️ Which of these is a lever? (a) a tap handle (b) a well pulley (c) a flagpole (d) a see-saw
33. 33.True or false: string is needed for the thread-reel pulley. (a) False (b) True
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) coins as the load (d) yeast
35. 35.True or false: a spoon lifting a lid is a lever. (a) True (b) False
36. 36.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
37. 37.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
38. 38.⚙️ Which of these uses a pulley? (a) a see-saw (b) a tap handle (c) a slide (d) a flagpole
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) string (c) yeast (d) a magnet
40. 40.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) the rope gets shorter (d) pulling down is easier

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