Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 987 · 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 coins as the load for the thread-reel pulley? (a) not needed (b) needed
2. 2.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) makes it magnetic (c) halves the weight (d) adds weight
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) a magnet (d) a small paper cup
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a pencil (c) turmeric powder (d) an empty thread reel
5. 5.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) pulling down is easier (c) the bucket floats (d) water gets lighter
6. 6.🔮 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
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) coins as the load (c) an empty thread reel (d) string
8. 8.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a magnet (d) an empty thread reel
10. 10.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
11. 11.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it turns blue (d) it can hurt your finger
12. 12.⚙️ Which of these is a lever? (a) a steering wheel (b) a tap handle (c) a crane (d) a bottle opener
13. 13.True or false: a see-saw uses a pulley. (a) False (b) True
14. 14.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it gets hot (d) it could fall on you
15. 15.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) True (b) False
18. 18.⚙️ Which simple machine is a tap handle? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
19. 19.True or false: a spoon lifting a lid uses a pulley. (a) False (b) True
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) the same cup of coins (c) number of pulleys (d) the same string
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) string (d) turmeric powder
22. 22.⚖️ 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
23. 23.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
24. 24.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) zero (d) double
25. 25.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) easier (d) impossible
26. 26.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
27. 27.True or false: a doorknob uses a pulley. (a) False (b) True
28. 28.⚖️ 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
29. 29.⚖️ 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
30. 30.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a bottle opener (c) a doorknob (d) a well pulley
31. 31.🧺 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) yeast (d) a pencil
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) how hard we must pull (c) number of pulleys
33. 33.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
34. 34.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
35. 35.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) in a circle (d) down
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a balloon (c) an empty thread reel (d) a small paper cup
37. 37.True or false: a flagpole uses a pulley. (a) False (b) True
38. 38.True or false: a crane is an inclined plane. (a) True (b) False
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) turmeric powder (c) a magnet (d) a pencil
40. 40.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) coins as the load (d) a mirror

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