Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 387 · 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 a lever? (a) a tap handle (b) a steering wheel (c) a doorknob (d) a see-saw
2. 2.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) the same (d) impossible
3. 3.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a bottle opener (c) a sloping road (d) a ramp
4. 4.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
5. 5.🧺 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) yeast
6. 6.⚖️ 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) number of pulleys (c) the lifting height (d) the same string
7. 7.True or false: a doorknob is a lever. (a) True (b) False
8. 8.⚙️ Which of these is a lever? (a) a doorknob (b) a slide (c) a bottle opener (d) a crane
9. 9.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets wet (c) it turns blue (d) it gets longer
10. 10.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) in a circle (c) sideways (d) down
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) coins as the load (d) turmeric powder
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.True or false: a well pulley uses a pulley. (a) True (b) False
14. 14.🧺 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) string (d) coins as the load
15. 15.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) zero (d) about half
16. 16.⚖️ 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) number of pulleys (c) the same cup of coins
17. 17.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a steering wheel (c) a crowbar (d) a spoon lifting a lid
18. 18.⚖️ 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
19. 19.⚖️ 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 measure it (c) we keep it the same
20. 20.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) water gets lighter (d) pulling down is easier
21. 21.⚙️ Which of these uses a pulley? (a) a doorknob (b) a well pulley (c) a slide (d) a spoon lifting a lid
22. 22.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
23. 23.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) magnet (c) battery (d) nail
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) a small paper cup (c) a pencil (d) string
25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) a magnet (d) string
26. 26.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
27. 27.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it is magnetic (d) it might sing
28. 28.⚙️ Which simple machine is a slide? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
29. 29.⚖️ 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
30. 30.⚖️ 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 same string (c) number of pulleys
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
32. 32.⚖️ 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) number of pulleys (c) the lifting height
33. 33.⚖️ 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
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) coins as the load (c) a pencil (d) an empty thread reel
35. 35.⚖️ 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 measure it (b) we change it (c) we keep it the same
36. 36.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
37. 37.True or false: a flagpole is an inclined plane. (a) False (b) True
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we keep it the same (c) we change it
39. 39.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
40. 40.True or false: a crowbar is a lever. (a) False (b) True

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