Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 189 · 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.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a small paper cup (c) a battery cell (d) a magnet
2. 2.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) makes it magnetic (c) halves the weight (d) adds weight
3. 3.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it gets hot (d) it might sing
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) a small paper cup (c) a pencil (d) an empty thread reel
5. 5.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) string (d) a magnet
7. 7.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
8. 8.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
9. 9.True or false: a crowbar is a lever. (a) False (b) True
10. 10.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
11. 11.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
12. 12.⚖️ 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
13. 13.⚖️ 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 change it (c) we keep it the same
14. 14.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
15. 15.True or false: a bottle opener is a lever. (a) True (b) False
16. 16.⚙️ Which of these uses a pulley? (a) a see-saw (b) a steering wheel (c) a well pulley (d) a doorknob
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) turmeric powder (d) a small paper cup
18. 18.⚖️ 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 lifting height (d) the same cup of coins
19. 19.⚖️ 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 keep it the same (c) we change it
20. 20.⚙️ Which simple machine is a bottle opener? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
21. 21.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it can hurt your finger (d) it turns blue
22. 22.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
23. 23.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
24. 24.True or false: a doorknob is a wheel and axle. (a) True (b) False
25. 25.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a pencil (c) a mirror (d) a magnet
27. 27.🏗️ 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
28. 28.⚖️ 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 lifting height (c) number of pulleys
29. 29.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
31. 31.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
32. 32.⚖️ 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
33. 33.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) harder (d) the same
34. 34.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 20 cm (d) 40 cm
35. 35.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
36. 36.True or false: a well pulley uses a pulley. (a) True (b) False
37. 37.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a bottle opener (c) a flagpole (d) a sloping road
38. 38.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
39. 39.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) coins as the load (c) a mirror (d) a magnet

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