Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 88 · 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.⚙️ Which simple machine is a tap handle? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
2. 2.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we measure it (c) we keep it the same
4. 4.True or false: string is needed for the thread-reel pulley. (a) False (b) True
5. 5.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the bench (c) on the flagpole (d) on the blackboard
6. 6.⚙️ Which simple machine is a ramp? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
7. 7.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 10 cm (d) 5 cm
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) a small paper cup (d) a balloon
9. 9.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) the same (d) double
10. 10.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a small paper cup (c) a magnet (d) turmeric powder
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a magnet (c) a battery cell (d) a balloon
12. 12.⚖️ 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
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) a mirror (d) coins as the load
14. 14.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
15. 15.🛟 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
16. 16.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
17. 17.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) True (b) False
19. 19.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a slide (c) a spoon lifting a lid (d) a bottle opener
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we keep it the same (c) we change it
21. 21.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
22. 22.True or false: a sloping road is an inclined plane. (a) False (b) True
23. 23.⚙️ Which of these uses a pulley? (a) a doorknob (b) a crane (c) a slide (d) a see-saw
24. 24.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
25. 25.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) a small paper cup (d) a pencil
27. 27.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a mirror (c) a battery cell (d) coins as the load
29. 29.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it turns blue (c) it gets wet (d) it gets longer
30. 30.⚙️ Which of these is a lever? (a) a sloping road (b) a flagpole (c) a crane (d) a see-saw
31. 31.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) down (d) in a circle
32. 32.⚖️ 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 cup of coins (b) number of pulleys (c) the lifting height (d) how hard we must pull
33. 33.⚖️ 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
34. 34.⚖️ 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
35. 35.⚖️ 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
36. 36.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) a magnet (d) string
38. 38.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
39. 39.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a crane (c) a tap handle (d) a ramp
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) the same cup of coins (c) the same string (d) number of pulleys

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