Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 980 · 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 could fall on you (b) it might sing (c) it is magnetic (d) it gets hot
2. 2.⚖️ 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
3. 3.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) the same (d) zero
4. 4.True or false: a doorknob is a lever. (a) True (b) False
5. 5.⚖️ 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 measure it (c) we keep it the same
6. 6.True or false: an empty thread reel is not 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) an empty thread reel (b) turmeric powder (c) coins as the load (d) a pencil
8. 8.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) sideways (c) up (d) down
9. 9.True or false: a ramp is a lever. (a) True (b) False
10. 10.True or false: a slide is an inclined plane. (a) True (b) False
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a mirror (d) a pencil
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) False (b) True
13. 13.⚖️ 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
14. 14.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
15. 15.⚙️ Which of these is an inclined plane? (a) a slide (b) a crowbar (c) a tap handle (d) a bottle opener
16. 16.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a pencil (c) a mirror (d) string
18. 18.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a pencil (c) an empty thread reel (d) turmeric powder
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a battery cell (c) a pencil (d) turmeric powder
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same string (b) number of pulleys (c) how hard we must pull
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) an empty thread reel (c) a small paper cup (d) string
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) the same string (c) the same cup of coins (d) the lifting height
23. 23.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we measure it (c) we change it
25. 25.⚙️ Which of these uses a pulley? (a) a flagpole (b) a tap handle (c) a steering wheel (d) a spoon lifting a lid
26. 26.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) makes it magnetic (d) halves the weight
27. 27.⚖️ 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
28. 28.True or false: a sloping road is a lever. (a) False (b) True
29. 29.⚙️ Which of these uses a pulley? (a) a well pulley (b) a spoon lifting a lid (c) a sloping road (d) a crowbar
30. 30.⚖️ 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) how hard we must pull (c) the same cup of coins (d) the same string
31. 31.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets longer (d) it gets wet
32. 32.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) water gets lighter (c) the bucket floats (d) the rope gets shorter
33. 33.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
34. 34.⚖️ 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 cup of coins (c) number of pulleys
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a magnet (c) an empty thread reel (d) yeast
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) yeast (d) coins as the load
37. 37.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
38. 38.⚙️ Which of these is a lever? (a) a slide (b) a bottle opener (c) a steering wheel (d) a flagpole
39. 39.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) a small paper cup (d) a magnet
40. 40.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed

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