Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 429 · 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 uses a pulley? (a) a flagpole (b) a ramp (c) a bottle opener (d) a doorknob
2. 2.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
3. 3.🔮 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
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) a pencil (c) coins as the load (d) string
5. 5.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) the same (d) harder
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) False (b) True
7. 7.⚙️ Which simple machine is a flagpole? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
8. 8.⚖️ 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 change it (c) we measure it
9. 9.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
10. 10.⚖️ 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
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) a pencil (c) an empty thread reel (d) coins as the load
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) an empty thread reel (c) a pencil (d) coins as the load
13. 13.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it can hurt your finger (d) it gets longer
14. 14.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) the same string (c) how hard we must pull (d) the same cup of coins
16. 16.⚖️ 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
17. 17.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) pulling down is easier (d) the rope gets shorter
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a magnet (d) a small paper cup
19. 19.True or false: a bottle opener is a wheel and axle. (a) False (b) True
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) a balloon (d) a pencil
21. 21.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
22. 22.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) battery (c) magnet (d) rope
23. 23.⚖️ 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
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) string (d) yeast
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) coins as the load (d) a balloon
26. 26.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
27. 27.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
29. 29.⚖️ 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
30. 30.⚙️ Which of these is a lever? (a) a bottle opener (b) a doorknob (c) a flagpole (d) a tap handle
31. 31.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
32. 32.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) up (c) in a circle (d) sideways
33. 33.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it is magnetic (d) it could fall on you
34. 34.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
35. 35.⚙️ Which simple machine is a well pulley? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
36. 36.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) an empty thread reel (c) coins as the load (d) a pencil
38. 38.True or false: a small paper cup is not 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? True or false: the same string is kept the same. (a) False (b) True
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we change it (c) we keep it the same

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