Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 641 · 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.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it gets wet (d) it turns blue
2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) a battery cell (d) a small paper cup
3. 3.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
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 keep it the same (c) we measure it
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) yeast (d) coins as the load
6. 6.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) the same (d) harder
7. 7.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
8. 8.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
9. 9.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) sideways (d) down
10. 10.⚖️ 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
11. 11.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) halves the weight (d) changes pull direction
12. 12.⚙️ Which of these is a lever? (a) a slide (b) a bottle opener (c) a tap handle (d) a well pulley
13. 13.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a crane (c) a doorknob (d) a see-saw
14. 14.True or false: a crane is a lever. (a) True (b) False
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) number of pulleys (c) the same cup of coins (d) how hard we must pull
16. 16.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it could fall on you (c) it might sing (d) it is magnetic
17. 17.⚖️ 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 change it (b) we measure it (c) we keep it the same
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) string (c) an empty thread reel (d) a small paper cup
20. 20.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
21. 21.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
22. 22.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) an empty thread reel (c) a magnet (d) yeast
24. 24.🔮 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
25. 25.True or false: a steering wheel uses a pulley. (a) True (b) False
26. 26.True or false: a see-saw is a lever. (a) False (b) True
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a mirror (c) yeast (d) a balloon
28. 28.⚖️ 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 string
29. 29.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the blackboard (c) in the tap (d) on the flagpole
30. 30.⚖️ 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
31. 31.True or false: a flagpole uses a pulley. (a) False (b) True
32. 32.⚖️ 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 same string
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) turmeric powder (c) a small paper cup (d) a balloon
34. 34.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a bottle opener (c) a see-saw (d) a crane
35. 35.⚖️ 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
36. 36.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
37. 37.⚖️ 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
38. 38.⚙️ Which of these is a lever? (a) a tap handle (b) a crane (c) a well pulley (d) a crowbar
39. 39.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
40. 40.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) turmeric powder (c) coins as the load (d) a small paper cup

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