Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 681 · 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.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) impossible (d) the same
2. 2.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
3. 3.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it can hurt your finger (d) it gets wet
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a balloon (c) a magnet (d) a small paper cup
5. 5.🧺 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
6. 6.⚖️ 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
7. 7.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 20 cm (d) 40 cm
8. 8.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it might sing (d) it gets hot
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) False (b) True
10. 10.⚖️ 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 lifting height
11. 11.⚙️ Which of these is an inclined plane? (a) a crane (b) a crowbar (c) a slide (d) a steering wheel
12. 12.⚖️ 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
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) turmeric powder (c) a battery cell (d) a pencil
14. 14.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
15. 15.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) magnet (d) nail
16. 16.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
17. 17.True or false: a doorknob is a wheel and axle. (a) False (b) True
18. 18.True or false: a see-saw is a lever. (a) True (b) False
19. 19.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
20. 20.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the bench (c) in the tap (d) on the flagpole
21. 21.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) makes it magnetic (d) changes pull direction
22. 22.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) coins as the load (c) turmeric powder (d) yeast
23. 23.True or false: a crowbar is a lever. (a) False (b) True
24. 24.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
25. 25.⚙️ Which of these uses a pulley? (a) a see-saw (b) a steering wheel (c) a flagpole (d) a doorknob
26. 26.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
27. 27.⚖️ 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
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) an empty thread reel (c) coins as the load (d) a pencil
29. 29.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) sideways (c) down (d) up
30. 30.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
31. 31.⚙️ Which of these is a lever? (a) a sloping road (b) a tap handle (c) a well pulley (d) a see-saw
32. 32.⚖️ 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 measure it (c) we change it
33. 33.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
34. 34.⚖️ 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) number of pulleys (c) how hard we must pull
35. 35.⚖️ 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 change it (c) we measure it
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a small paper cup (c) a battery cell (d) coins as the load
37. 37.⚙️ Which of these is a lever? (a) a slide (b) a ramp (c) a sloping road (d) a bottle opener
38. 38.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
39. 39.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
40. 40.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a mirror (c) an empty thread reel (d) a pencil

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