Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 295 · 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 “the same cup of coins”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
3. 3.⚖️ 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
4. 4.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) makes it magnetic (d) changes pull direction
5. 5.⚖️ 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) number of pulleys (d) the same string
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a balloon (c) a pencil (d) turmeric powder
7. 7.🛟 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
8. 8.⚙️ Which of these is a lever? (a) a flagpole (b) a see-saw (c) a slide (d) a ramp
9. 9.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
10. 10.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a battery cell (c) turmeric powder (d) string
12. 12.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) coins as the load (d) a balloon
15. 15.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
16. 16.⚖️ 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) True (b) False
17. 17.⚖️ 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) True (b) False
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
19. 19.⚖️ 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) True (b) False
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) string (c) an empty thread reel (d) coins as the load
21. 21.🛟 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
22. 22.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
23. 23.⚙️ Which of these is a lever? (a) a well pulley (b) a sloping road (c) a spoon lifting a lid (d) a tap handle
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a battery cell (d) an empty thread reel
25. 25.⚙️ Which of these uses a pulley? (a) a ramp (b) a crowbar (c) a well pulley (d) a steering wheel
26. 26.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) in a circle (d) down
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a magnet (c) string (d) a pencil
28. 28.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) zero (d) about half
29. 29.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) rope (c) battery (d) nail
30. 30.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
31. 31.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 5 cm (c) 10 cm (d) 20 cm
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a magnet (c) a small paper cup (d) a pencil
33. 33.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
34. 34.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a see-saw (c) a steering wheel (d) a bottle opener
35. 35.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) the bucket floats (c) water gets lighter (d) pulling down is easier
36. 36.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) number of pulleys (c) the same cup of coins (d) how hard we must pull
38. 38.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
40. 40.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever

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