Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 106 · 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: number of pulleys is the one thing we change. (a) True (b) False
2. 2.🏗️ 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
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) True (b) False
4. 4.⚙️ Which simple machine is a sloping road? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
5. 5.⚖️ 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
6. 6.⚖️ 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 keep it the same (b) we measure it (c) we change it
7. 7.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
8. 8.⚖️ 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
9. 9.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
10. 10.⚙️ Which simple machine is a see-saw? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
11. 11.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) a magnet (d) a battery cell
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a battery cell (c) string (d) an empty thread reel
14. 14.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the blackboard (c) on the bench (d) on the flagpole
15. 15.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
16. 16.True or false: a sloping road is an inclined plane. (a) True (b) False
17. 17.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it can hurt your finger (d) it gets longer
18. 18.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it could fall on you (d) it might sing
19. 19.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
20. 20.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a doorknob (c) a crowbar (d) a crane
21. 21.True or false: a steering wheel is a lever. (a) True (b) False
22. 22.⚙️ Which of these is a lever? (a) a steering wheel (b) a doorknob (c) a ramp (d) a bottle opener
23. 23.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) coins as the load (c) a pencil (d) an empty thread reel
24. 24.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
25. 25.True or false: a bottle opener is an inclined plane. (a) True (b) False
26. 26.⚖️ 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
27. 27.⚖️ 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 lifting height (c) how hard we must pull
28. 28.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a see-saw (c) a ramp (d) a crane
29. 29.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a magnet (c) coins as the load (d) turmeric powder
31. 31.⚖️ 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 same cup of coins (c) the lifting height (d) number of pulleys
32. 32.True or false: a spoon lifting a lid is a wheel and axle. (a) False (b) True
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
34. 34.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we measure it (c) we keep it the same
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) turmeric powder (c) an empty thread reel (d) string
37. 37.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
38. 38.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) impossible (d) the same
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) a small paper cup (d) yeast
40. 40.True or false: a crowbar is an inclined plane. (a) False (b) True

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