Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 930 · 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.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it is magnetic (d) it could fall on you
2. 2.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
3. 3.True or false: string is needed for the thread-reel pulley. (a) True (b) False
4. 4.True or false: a steering wheel is a lever. (a) False (b) True
5. 5.⚖️ 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
6. 6.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) an empty thread reel (d) a battery cell
8. 8.True or false: a spoon lifting a lid is a lever. (a) True (b) False
9. 9.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
10. 10.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) a battery cell (d) coins as the load
11. 11.True or false: a see-saw uses a pulley. (a) True (b) False
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) False (b) True
13. 13.🧺 Do we need a small paper cup 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) coins as the load (b) a balloon (c) string (d) a small paper cup
15. 15.⚖️ 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
16. 16.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it gets wet (d) it can hurt your finger
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) a magnet (d) a small paper cup
18. 18.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) in a circle (d) down
19. 19.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) impossible (d) the same
20. 20.⚖️ 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) False (b) True
21. 21.⚖️ 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
22. 22.⚖️ 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 keep it the same (c) we change it
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) coins as the load (c) a small paper cup (d) string
24. 24.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) halves the weight (c) adds weight (d) makes it magnetic
25. 25.True or false: a ramp is an inclined plane. (a) False (b) True
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a mirror (d) a small paper cup
27. 27.🔮 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
28. 28.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) the same (d) about half
29. 29.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
30. 30.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
31. 31.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
32. 32.⚙️ Which of these is a lever? (a) a steering wheel (b) a ramp (c) a bottle opener (d) a sloping road
33. 33.⚖️ 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) how hard we must pull (c) the lifting height
34. 34.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
35. 35.⚖️ 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) number of pulleys (c) the same cup of coins (d) the lifting height
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) turmeric powder (c) an empty thread reel (d) string
37. 37.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a tap handle (c) a crane (d) a well pulley
38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) turmeric powder (c) a small paper cup (d) a mirror
39. 39.True or false: a crowbar is a lever. (a) False (b) True
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) a balloon (d) an empty thread reel

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