Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 439 · 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 is a lever? (a) a well pulley (b) a ramp (c) a see-saw (d) a crane
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) about half (d) zero
3. 3.⚖️ 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 change it (b) we keep it the same (c) we measure it
4. 4.True or false: a spoon lifting a lid is a lever. (a) False (b) True
5. 5.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a mirror (c) a small paper cup (d) coins as the load
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a magnet (c) a small paper cup (d) string
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) True (b) False
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) how hard we must pull (c) the same cup of coins (d) number of pulleys
9. 9.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it could fall on you (d) it gets hot
10. 10.⚖️ 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 lifting height
11. 11.⚖️ 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) number of pulleys (c) the same cup of coins (d) the lifting height
12. 12.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
13. 13.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
14. 14.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) impossible (d) easier
15. 15.⚙️ Which of these uses a pulley? (a) a well pulley (b) a see-saw (c) a ramp (d) a spoon lifting a lid
16. 16.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
17. 17.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) down (c) in a circle (d) up
18. 18.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) makes it magnetic (d) changes pull direction
19. 19.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a sloping road (c) a ramp (d) a flagpole
20. 20.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 20 cm (d) 10 cm
21. 21.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) an empty thread reel (c) coins as the load (d) string
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
24. 24.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
25. 25.True or false: a tap handle is a wheel and axle. (a) False (b) True
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) a mirror (d) string
27. 27.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
28. 28.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
29. 29.⚙️ Which simple machine is a slide? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
30. 30.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the bench (c) in the tap (d) on the blackboard
31. 31.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) coins as the load (c) yeast (d) a magnet
33. 33.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
34. 34.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
35. 35.True or false: a doorknob is a wheel and axle. (a) False (b) True
36. 36.True or false: a tap handle is a lever. (a) False (b) True
37. 37.⚖️ 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
38. 38.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
39. 39.True or false: string is needed for the thread-reel pulley. (a) True (b) False
40. 40.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) turmeric powder (c) an empty thread reel (d) string

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