Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 695 · 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.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) the same (d) about half
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 keep it the same (c) we change it
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) a small paper cup (c) an empty thread reel (d) string
5. 5.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
6. 6.⚖️ 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) the lifting height (c) the same string (d) number of pulleys
7. 7.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a magnet (c) yeast (d) coins as the load
9. 9.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
10. 10.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a battery cell (c) a magnet (d) turmeric powder
11. 11.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a sloping road (c) a bottle opener (d) a crane
12. 12.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
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.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) coins as the load (c) a small paper cup (d) an empty thread reel
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) True (b) False
16. 16.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it can hurt your finger (d) it turns blue
17. 17.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
18. 18.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) turmeric powder (c) a magnet (d) a pencil
20. 20.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
21. 21.⚖️ 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
22. 22.⚙️ Which simple machine is a see-saw? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
23. 23.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 10 cm (d) 20 cm
24. 24.⚖️ 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) the same string (c) how hard we must pull
25. 25.⚙️ Which of these uses a pulley? (a) a flagpole (b) a slide (c) a tap handle (d) a crowbar
26. 26.⚙️ Which of these is a lever? (a) a see-saw (b) a well pulley (c) a slide (d) a crane
27. 27.⚖️ 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 keep it the same (c) we measure it
28. 28.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) pulling down is easier (c) the rope gets shorter (d) water gets lighter
29. 29.⚖️ 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 change it (c) we measure it
30. 30.⚙️ Which of these is a lever? (a) a well pulley (b) a tap handle (c) a crane (d) a spoon lifting a lid
31. 31.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) makes it magnetic (d) halves the weight
32. 32.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) in a circle (d) down
33. 33.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
34. 34.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
35. 35.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) impossible (d) harder
36. 36.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
37. 37.True or false: a see-saw is a lever. (a) False (b) True
38. 38.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
39. 39.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
40. 40.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a bottle opener (c) a see-saw (d) a ramp

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