Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 281 · 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) a small paper cup (b) coins as the load (c) an empty thread reel (d) turmeric powder
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a magnet (c) a pencil (d) a small paper cup
3. 3.⚙️ Which of these uses a pulley? (a) a crane (b) a steering wheel (c) a bottle opener (d) a doorknob
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we measure it (c) we keep it the same
5. 5.True or false: a ramp is an inclined plane. (a) False (b) True
6. 6.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
7. 7.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) a small paper cup (d) a battery cell
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.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) halves the weight (c) adds weight (d) makes it magnetic
11. 11.⚙️ Which of these is a lever? (a) a crane (b) a doorknob (c) a sloping road (d) a spoon lifting a lid
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) an empty thread reel (c) a magnet (d) turmeric powder
14. 14.True or false: a doorknob is a lever. (a) True (b) False
15. 15.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
16. 16.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a steering wheel (c) a bottle opener (d) a spoon lifting a lid
17. 17.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
18. 18.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) sideways (c) up (d) in a circle
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) coins as the load (d) a battery cell
20. 20.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a doorknob (c) a crowbar (d) a bottle opener
21. 21.⚖️ 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) the same string (c) number of pulleys
22. 22.⚖️ 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) False (b) True
23. 23.⚖️ 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 measure it (b) we change it (c) we keep it the same
24. 24.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
25. 25.True or false: a crane uses a pulley. (a) False (b) True
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a battery cell (c) coins as the load (d) an empty thread reel
27. 27.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it gets longer (d) it turns blue
28. 28.⚙️ Which of these is a lever? (a) a see-saw (b) a ramp (c) a crane (d) a doorknob
29. 29.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) magnet (d) nail
30. 30.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
31. 31.True or false: a flagpole is a wheel and axle. (a) True (b) False
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) string (c) coins as the load (d) a small paper cup
33. 33.True or false: a spoon lifting a lid is a lever. (a) True (b) False
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a balloon (c) an empty thread reel (d) string
35. 35.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
36. 36.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the flagpole (c) on the bench (d) in the tap
37. 37.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same string (b) how hard we must pull (c) the lifting height (d) number of pulleys
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) True (b) False
40. 40.⚖️ 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) True (b) False

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