Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 672 · 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 yeast for the thread-reel pulley? (a) needed (b) not needed
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a magnet (c) a mirror (d) string
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) a mirror (d) coins as the load
4. 4.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
5. 5.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it could fall on you (d) it might sing
6. 6.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) a balloon (d) coins as the load
8. 8.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
9. 9.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) nail (d) rope
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) an empty thread reel (c) a battery cell (d) a balloon
12. 12.⚖️ 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
13. 13.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) impossible (d) the same
14. 14.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
15. 15.True or false: a crowbar is a lever. (a) False (b) True
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) string (d) a mirror
17. 17.⚙️ Which of these is a lever? (a) a steering wheel (b) a doorknob (c) a flagpole (d) a bottle opener
18. 18.⚙️ Which of these is a lever? (a) a flagpole (b) a well pulley (c) a spoon lifting a lid (d) a crane
19. 19.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a crowbar (c) a tap handle (d) a see-saw
20. 20.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
21. 21.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
22. 22.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
23. 23.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
24. 24.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a bottle opener (c) a see-saw (d) a slide
25. 25.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
26. 26.⚙️ Which of these uses a pulley? (a) a doorknob (b) a see-saw (c) a well pulley (d) a spoon lifting a lid
27. 27.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) down (d) in a circle
28. 28.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
29. 29.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) a balloon (d) a small paper cup
30. 30.⚙️ Which of these is a lever? (a) a crowbar (b) a flagpole (c) a crane (d) a steering wheel
31. 31.⚖️ 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
32. 32.⚖️ 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) how hard we must pull (c) the same string (d) the same cup of coins
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a pencil (d) a battery cell
34. 34.⚙️ Which of these uses a pulley? (a) a flagpole (b) a ramp (c) a bottle opener (d) a spoon lifting a lid
35. 35.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
36. 36.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) the same (d) zero
37. 37.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) adds weight (c) makes it magnetic (d) halves the weight
38. 38.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “how hard we must pull”? (a) we change it (b) we keep it the same (c) we measure it
40. 40.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True

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