Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 630 · 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.⚖️ 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
2. 2.⚖️ 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 measure it (c) we keep it the same
3. 3.⚖️ 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
4. 4.⚖️ 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) False (b) True
5. 5.⚖️ 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) number of pulleys (d) how hard we must pull
6. 6.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
7. 7.⚖️ 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 same string
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a balloon (c) string (d) turmeric powder
9. 9.⚖️ 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 lifting height (d) the same cup of coins
10. 10.⚙️ Which simple machine is a slide? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
11. 11.True or false: a spoon lifting a lid is a wheel and axle. (a) True (b) False
12. 12.⚙️ Which of these is a lever? (a) a ramp (b) a slide (c) a doorknob (d) a bottle opener
13. 13.⚖️ 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 cup of coins (c) number of pulleys
14. 14.⚖️ 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) False (b) True
15. 15.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) yeast (d) a small paper cup
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) string (c) a pencil (d) a small paper cup
17. 17.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
18. 18.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it might sing (d) it could fall on you
19. 19.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it turns blue (d) it gets longer
20. 20.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
21. 21.🏗️ 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
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) an empty thread reel (d) a magnet
23. 23.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) the same (d) double
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a mirror (d) a pencil
25. 25.⚙️ Which of these uses a pulley? (a) a sloping road (b) a ramp (c) a crane (d) a steering wheel
26. 26.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
27. 27.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) turmeric powder (d) an empty thread reel
29. 29.True or false: a crowbar is a lever. (a) False (b) True
30. 30.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) in the tap (c) on the blackboard (d) on the flagpole
31. 31.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) changes pull direction (d) halves the weight
32. 32.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a battery cell (c) a mirror (d) a balloon
34. 34.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
35. 35.True or false: a see-saw is a lever. (a) False (b) True
36. 36.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a spoon lifting a lid (c) a steering wheel (d) a doorknob
37. 37.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
38. 38.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a battery cell (c) a small paper cup (d) coins as the load
40. 40.⚙️ Which simple machine is a ramp? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane

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