Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 343 · 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.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
2. 2.🛟 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
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a magnet (c) a balloon (d) string
4. 4.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a spoon lifting a lid (c) a ramp (d) a flagpole
5. 5.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a mirror (c) a pencil (d) a small paper cup
6. 6.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) impossible (d) harder
7. 7.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
8. 8.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
9. 9.True or false: a bottle opener uses a pulley. (a) False (b) True
10. 10.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it can hurt your finger (d) it turns blue
11. 11.🧺 Do we need a magnet 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: how hard we must pull is what we measure. (a) True (b) False
13. 13.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) about half (d) double
14. 14.⚖️ 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) number of pulleys (c) how hard we must pull
15. 15.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) coins as the load (d) a magnet
16. 16.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
17. 17.⚖️ 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
18. 18.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
19. 19.True or false: a well pulley uses a pulley. (a) True (b) False
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) coins as the load (c) a magnet (d) a battery cell
21. 21.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) down (d) sideways
22. 22.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) turmeric powder (c) yeast (d) a magnet
23. 23.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
24. 24.True or false: a well pulley is a lever. (a) True (b) False
25. 25.True or false: a bottle opener is an inclined plane. (a) True (b) False
26. 26.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 5 cm (c) 40 cm (d) 10 cm
27. 27.⚖️ 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 lifting height
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we keep it the same (c) we measure it
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) False (b) True
30. 30.True or false: a steering wheel is an inclined plane. (a) False (b) True
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
32. 32.⚙️ Which of these is a wheel and axle? (a) a crane (b) a sloping road (c) a well pulley (d) a doorknob
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) a balloon (d) an empty thread reel
34. 34.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
35. 35.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
36. 36.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) an empty thread reel (d) a mirror
38. 38.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a pencil (c) a battery cell (d) a magnet
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) how hard we must pull (c) the same cup of coins (d) number of pulleys

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