Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 373 · 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.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
2. 2.⚙️ Which simple machine is a slide? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
3. 3.⚙️ Which of these is a lever? (a) a sloping road (b) a crane (c) a bottle opener (d) a ramp
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a battery cell (c) coins as the load (d) string
5. 5.⚖️ 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) how hard we must pull (c) number of pulleys (d) the same cup of coins
6. 6.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
7. 7.⚙️ Which simple machine is a sloping road? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a mirror (d) an empty thread reel
9. 9.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
10. 10.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) zero (d) double
11. 11.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 40 cm (d) 10 cm
12. 12.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
13. 13.⚖️ 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
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
15. 15.True or false: a ramp is an inclined plane. (a) False (b) True
16. 16.⚖️ 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
17. 17.True or false: an empty thread reel is 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) an empty thread reel (b) a magnet (c) coins as the load (d) a small paper cup
19. 19.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it could fall on you (d) it might sing
20. 20.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a balloon (c) a battery cell (d) string
22. 22.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a flagpole (c) a doorknob (d) a sloping road
23. 23.True or false: a bottle opener is a lever. (a) False (b) True
24. 24.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) how hard we must pull (c) the lifting height
28. 28.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
29. 29.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) pulling down is easier (d) water gets lighter
30. 30.⚙️ Which of these is a lever? (a) a sloping road (b) a well pulley (c) a steering wheel (d) a crowbar
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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a balloon (c) coins as the load (d) a pencil
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) an empty thread reel (c) a small paper cup (d) a pencil
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we measure it (c) we keep it the same
35. 35.⚖️ 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
36. 36.⚙️ Which simple machine is a crane? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
37. 37.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a sloping road (c) a ramp (d) a well pulley
38. 38.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
39. 39.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
40. 40.⚙️ Which of these uses a pulley? (a) a ramp (b) a sloping road (c) a well pulley (d) a doorknob

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