Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 981 · 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? What do we do with “how hard we must pull”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the lifting height (c) how hard we must pull (d) the same cup of coins
3. 3.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it is magnetic (d) it could fall on you
4. 4.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
5. 5.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it turns blue (d) it can hurt your finger
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) turmeric powder (c) string (d) a magnet
7. 7.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a flagpole (c) a doorknob (d) a slide
8. 8.⚖️ 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
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same string (b) number of pulleys (c) how hard we must pull
10. 10.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) a pencil (c) coins as the load (d) a small paper cup
12. 12.⚖️ 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 same string (d) the lifting height
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a magnet (c) a balloon (d) a battery cell
14. 14.⚖️ 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 change it (c) we keep it the same
15. 15.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
16. 16.🇮🇳 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
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) turmeric powder (d) coins as the load
18. 18.🧺 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) coins as the load
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a battery cell (c) a balloon (d) an empty thread reel
20. 20.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a mirror (c) coins as the load (d) a small paper cup
22. 22.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
23. 23.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) yeast (c) a small paper cup (d) coins as the load
25. 25.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
26. 26.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
27. 27.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
28. 28.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
30. 30.⚙️ Which of these is a lever? (a) a see-saw (b) a sloping road (c) a ramp (d) a slide
31. 31.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a tap handle (c) a slide (d) a crowbar
32. 32.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
33. 33.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
34. 34.True or false: a flagpole uses a pulley. (a) False (b) True
35. 35.⚙️ Which of these uses a pulley? (a) a crowbar (b) a flagpole (c) a see-saw (d) a bottle opener
36. 36.⚙️ Which simple machine is a doorknob? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
37. 37.⚖️ 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
38. 38.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
39. 39.True or false: a crowbar is a lever. (a) False (b) True
40. 40.True or false: a crane is an inclined plane. (a) False (b) True

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