Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 868 · 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.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 10 cm (d) 5 cm
2. 2.🧺 Do we need a battery cell 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 measure it (b) we keep it the same (c) we change it
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) string (d) a mirror
5. 5.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
6. 6.⚖️ 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) the same cup of coins (c) the same string (d) how hard we must pull
7. 7.⚙️ Which simple machine is a flagpole? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) an empty thread reel (c) a pencil (d) a small paper cup
9. 9.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) battery (c) magnet (d) rope
10. 10.⚖️ 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
11. 11.⚖️ 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) how hard we must pull (d) number of pulleys
12. 12.⚖️ 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
13. 13.⚖️ 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
14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) turmeric powder (c) yeast (d) a battery cell
15. 15.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
16. 16.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a crane (c) a well pulley (d) a ramp
17. 17.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) halves the weight (d) changes pull direction
18. 18.⚖️ 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
19. 19.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it gets hot (d) it could fall on you
20. 20.⚖️ 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 same string (c) how hard we must pull
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) string (c) an empty thread reel (d) coins as the load
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) False (b) True
23. 23.⚖️ 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 measure it (b) we change it (c) we keep it the same
24. 24.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it gets longer (d) it turns blue
25. 25.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) in a circle (c) down (d) sideways
26. 26.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a sloping road (c) a spoon lifting a lid (d) a tap handle
27. 27.True or false: string is needed for the thread-reel pulley. (a) True (b) False
28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a mirror (c) yeast (d) a small paper cup
29. 29.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) yeast (c) coins as the load (d) a pencil
30. 30.True or false: a bottle opener uses a pulley. (a) True (b) False
31. 31.⚖️ 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) False (b) True
32. 32.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) the same (d) easier
33. 33.True or false: a crane is a lever. (a) True (b) False
34. 34.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
35. 35.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
36. 36.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
37. 37.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
38. 38.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
39. 39.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
40. 40.⚙️ Which simple machine is a see-saw? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle

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