Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 491 · 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 balloon for the thread-reel pulley? (a) not needed (b) needed
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) double (d) about half
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) string (c) a pencil (d) coins as the load
4. 4.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
5. 5.🧺 Do we need a battery cell 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 kept the same? (a) how hard we must pull (b) number of pulleys (c) the same cup of coins
7. 7.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
8. 8.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
9. 9.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
11. 11.⚖️ 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
12. 12.⚖️ 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
13. 13.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a mirror (c) coins as the load (d) a magnet
15. 15.⚙️ Which of these uses a pulley? (a) a crowbar (b) a tap handle (c) a slide (d) a well pulley
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) yeast (d) coins as the load
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we measure it (c) we keep it the same
18. 18.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) False (b) True
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a magnet (c) a balloon (d) an empty thread reel
21. 21.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) down (d) in a circle
22. 22.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) magnet (c) rope (d) battery
23. 23.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 5 cm (d) 40 cm
24. 24.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
25. 25.True or false: a flagpole uses a pulley. (a) False (b) True
26. 26.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it could fall on you (d) it might sing
27. 27.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
28. 28.⚖️ 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 same string
29. 29.⚖️ 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
30. 30.🏗️ 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
31. 31.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
32. 32.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
33. 33.⚖️ 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
34. 34.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
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 of these is a lever? (a) a slide (b) a doorknob (c) a crowbar (d) a flagpole
37. 37.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
38. 38.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
39. 39.⚖️ 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 change it (c) we measure it
40. 40.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) turmeric powder (c) a small paper cup (d) coins as the load

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