Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 653 · 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: a magnet is needed for the thread-reel pulley. (a) False (b) True
2. 2.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it gets hot (d) it is magnetic
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) the same string (c) number of pulleys
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) coins as the load (c) string (d) a small paper cup
5. 5.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) a mirror (d) a pencil
7. 7.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a doorknob (c) a ramp (d) a slide
8. 8.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
9. 9.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
10. 10.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
11. 11.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
12. 12.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
13. 13.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) turmeric powder (c) coins as the load (d) a pencil
15. 15.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) string (c) a pencil (d) a small paper cup
16. 16.⚖️ 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
17. 17.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
18. 18.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a crowbar (c) a bottle opener (d) a sloping road
19. 19.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
20. 20.⚖️ 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
21. 21.⚖️ 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 keep it the same (c) we measure it
22. 22.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) down (c) in a circle (d) sideways
23. 23.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
24. 24.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
25. 25.⚖️ 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 string (b) the same cup of coins (c) number of pulleys (d) the lifting height
26. 26.⚖️ 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
27. 27.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
28. 28.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it turns blue (d) it gets longer
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 change it (b) we measure it (c) we keep it the same
30. 30.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
31. 31.⚙️ Which simple machine is a slide? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
32. 32.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) adds weight (c) halves the weight (d) makes it magnetic
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a mirror (c) a battery cell (d) a small paper cup
34. 34.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) about half (d) zero
35. 35.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) easier (d) the same
36. 36.True or false: a tap handle uses a pulley. (a) False (b) True
37. 37.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) an empty thread reel (c) a balloon (d) a magnet
38. 38.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
39. 39.⚙️ Which of these is an inclined plane? (a) a slide (b) a see-saw (c) a well pulley (d) a doorknob
40. 40.⚖️ 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) the same cup of coins (d) how hard we must pull

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