Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 320 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a pencil (d) turmeric powder
2. 2.True or false: a steering wheel uses a pulley. (a) False (b) True
3. 3.🧺 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) an empty thread reel
4. 4.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
5. 5.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) turmeric powder (c) a small paper cup (d) a pencil
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) a small paper cup (c) an empty thread reel (d) coins as the load
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) the same string (c) how hard we must pull (d) number of pulleys
8. 8.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) adds weight (d) halves the weight
9. 9.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
10. 10.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
11. 11.🛟 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
12. 12.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
13. 13.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) in the tap (c) on the bench (d) on the flagpole
14. 14.🏗️ 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
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
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) False (b) True
17. 17.⚙️ Which simple machine is a tap handle? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) the same cup of coins (c) the lifting height (d) how hard we must pull
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a pencil (c) an empty thread reel (d) a battery cell
20. 20.⚖️ 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
21. 21.True or false: a see-saw is a lever. (a) False (b) True
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.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
24. 24.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
25. 25.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a see-saw (c) a ramp (d) a steering wheel
26. 26.True or false: a ramp uses a pulley. (a) True (b) False
27. 27.⚖️ 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
28. 28.⚙️ Which simple machine is a crowbar? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
29. 29.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
30. 30.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
31. 31.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
32. 32.⚙️ Which of these uses a pulley? (a) a see-saw (b) a flagpole (c) a sloping road (d) a ramp
33. 33.⚙️ Which of these is a lever? (a) a tap handle (b) a flagpole (c) a crane (d) a spoon lifting a lid
34. 34.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
35. 35.⚖️ 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
36. 36.⚖️ 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) True (b) False
37. 37.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) nail (d) rope
38. 38.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 5 cm (c) 10 cm (d) 40 cm
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a balloon (c) yeast (d) a small paper cup
40. 40.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it can hurt your finger (d) it gets wet

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