Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 638 · 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 see-saw uses a pulley. (a) True (b) False
2. 2.⚖️ 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 measure it (b) we change it (c) we keep it the same
3. 3.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) halves the weight (d) makes it magnetic
4. 4.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) coins as the load (d) turmeric powder
6. 6.True or false: a flagpole is an inclined plane. (a) False (b) True
7. 7.⚙️ Which of these is a lever? (a) a see-saw (b) a well pulley (c) a steering wheel (d) a doorknob
8. 8.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a flagpole (c) a sloping road (d) a steering wheel
9. 9.⚙️ Which of these uses a pulley? (a) a slide (b) a crane (c) a sloping road (d) a bottle opener
10. 10.⚙️ Which simple machine is a well pulley? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
11. 11.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 20 cm (d) 5 cm
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a battery cell (c) a small paper cup (d) turmeric powder
13. 13.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
14. 14.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
15. 15.True or false: a sloping road uses a pulley. (a) True (b) False
16. 16.⚙️ Which simple machine is a tap handle? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
17. 17.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
18. 18.⚖️ 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
19. 19.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
20. 20.⚖️ 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 change it (c) we measure it
21. 21.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string 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? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the same string
24. 24.⚙️ Which of these is a lever? (a) a slide (b) a tap handle (c) a doorknob (d) a spoon lifting a lid
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 cup of coins (b) the lifting height (c) how hard we must pull (d) number of pulleys
26. 26.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it is magnetic (d) it gets hot
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a balloon (c) string (d) an empty thread reel
28. 28.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a doorknob (c) a spoon lifting a lid (d) a crane
29. 29.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) down (c) sideways (d) in a circle
30. 30.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
31. 31.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it turns blue (d) it can hurt your finger
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) yeast (d) a pencil
33. 33.⚖️ 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
34. 34.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
36. 36.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) easier (d) harder
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) a pencil (c) an empty thread reel (d) a small paper cup
38. 38.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) how hard we must pull (c) the lifting height (d) number of pulleys
40. 40.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) a pencil (c) a small paper cup (d) coins as the load

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