Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 982 · 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.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) the same (d) double
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) string (c) a pencil (d) a small paper cup
4. 4.⚖️ 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 change it (b) we measure it (c) we keep it the same
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) turmeric powder (c) string (d) a battery cell
7. 7.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) nail (d) rope
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a balloon (c) a small paper cup (d) coins as the load
9. 9.⚖️ 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) True (b) False
10. 10.⚖️ 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 change it (c) we measure it
11. 11.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a small paper cup (c) string (d) yeast
12. 12.⚙️ Which simple machine is a bottle opener? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) an empty thread reel (c) a battery cell (d) a magnet
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) coins as the load (c) a small paper cup (d) an empty thread reel
15. 15.⚖️ 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
16. 16.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
17. 17.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it gets wet (d) it turns blue
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) coins as the load (d) yeast
19. 19.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it could fall on you (d) it is magnetic
20. 20.🏗️ 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
21. 21.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
22. 22.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
23. 23.True or false: a see-saw is an inclined plane. (a) True (b) False
24. 24.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
25. 25.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
26. 26.True or false: a flagpole uses a pulley. (a) False (b) True
27. 27.⚖️ 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
28. 28.⚖️ 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
29. 29.True or false: a bottle opener is a lever. (a) True (b) False
30. 30.True or false: a slide is a lever. (a) False (b) True
31. 31.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
32. 32.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
33. 33.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
34. 34.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
35. 35.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
36. 36.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
37. 37.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
38. 38.⚖️ 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
39. 39.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
40. 40.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever

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