Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 820 · 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 is magnetic (b) it gets hot (c) it could fall on you (d) it might sing
2. 2.True or false: string is needed for the thread-reel pulley. (a) False (b) True
3. 3.⚙️ Which of these uses a pulley? (a) a tap handle (b) a sloping road (c) a spoon lifting a lid (d) a crane
4. 4.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we measure it (c) we keep it the same
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) turmeric powder (d) an empty thread reel
8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) an empty thread reel (c) string (d) a pencil
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) turmeric powder (d) a small paper cup
10. 10.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) an empty thread reel (d) a battery cell
11. 11.⚙️ Which simple machine is a slide? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
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.⚙️ Which of these is an inclined plane? (a) a ramp (b) a doorknob (c) a well pulley (d) a tap handle
14. 14.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
15. 15.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) yeast (c) an empty thread reel (d) a pencil
17. 17.⚖️ 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) number of pulleys (d) how hard we must pull
18. 18.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) the same (d) easier
19. 19.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the lifting height (b) how hard we must pull (c) number of pulleys
21. 21.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) a small paper cup (c) string (d) coins as the load
23. 23.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a flagpole (c) a crowbar (d) a spoon lifting a lid
24. 24.🧺 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) coins as the load
25. 25.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
26. 26.⚙️ Which of these uses a pulley? (a) a ramp (b) a crowbar (c) a well pulley (d) a bottle opener
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a pencil (d) a mirror
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) the same string (c) the lifting height (d) the same cup of coins
29. 29.⚖️ 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) True (b) False
30. 30.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
31. 31.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
32. 32.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
33. 33.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) halves the weight (d) adds weight
34. 34.⚖️ 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
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a magnet (c) a pencil (d) a small paper cup
36. 36.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
37. 37.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
38. 38.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
39. 39.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) zero (d) the same
40. 40.True or false: a bottle opener is a lever. (a) True (b) False

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