Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 791 · 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 needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) a battery cell (d) a pencil
2. 2.⚙️ Which of these is a lever? (a) a ramp (b) a tap handle (c) a sloping road (d) a crowbar
3. 3.True or false: a flagpole is a lever. (a) True (b) False
4. 4.⚙️ Which of these uses a pulley? (a) a slide (b) a tap handle (c) a ramp (d) a crane
5. 5.True or false: a sloping road is a lever. (a) False (b) True
6. 6.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
7. 7.🧺 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) turmeric powder
8. 8.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) the same (d) harder
9. 9.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
10. 10.True or false: a sloping road is an inclined plane. (a) False (b) True
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same string (b) how hard we must pull (c) number of pulleys
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) yeast (c) an empty thread reel (d) a pencil
13. 13.True or false: a flagpole uses a pulley. (a) False (b) True
14. 14.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) halves the weight (d) makes it magnetic
15. 15.True or false: a bottle opener is a lever. (a) True (b) False
16. 16.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
17. 17.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 40 cm (d) 20 cm
18. 18.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a see-saw (c) a ramp (d) a crane
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) string (c) a pencil (d) coins as the load
20. 20.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) sideways (c) up (d) down
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a battery cell (c) a balloon (d) a magnet
22. 22.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
23. 23.⚖️ 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
24. 24.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
25. 25.⚖️ 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
26. 26.⚙️ Which simple machine is a crowbar? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
27. 27.⚖️ 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) True (b) False
28. 28.⚙️ Which of these uses a pulley? (a) a crowbar (b) a bottle opener (c) a flagpole (d) a tap handle
29. 29.⚖️ 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
30. 30.True or false: a doorknob is a wheel and axle. (a) True (b) False
31. 31.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it could fall on you (d) it is magnetic
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) the lifting height (c) the same cup of coins (d) number of pulleys
33. 33.⚖️ 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 cup of coins (c) the lifting height (d) the same string
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) coins as the load (c) a mirror (d) a small paper cup
35. 35.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
36. 36.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a magnet (c) a pencil (d) an empty thread reel
38. 38.🧺 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) yeast (d) a pencil
39. 39.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the blackboard (c) on the bench (d) on the flagpole
40. 40.⚖️ 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

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