Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 554 · 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 bottle opener is a lever. (a) False (b) True
2. 2.⚖️ 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
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a mirror (d) coins as the load
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) yeast (c) an empty thread reel (d) coins as the load
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) yeast (c) string (d) a magnet
6. 6.⚖️ 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) the same string (c) the same cup of coins (d) how hard we must pull
7. 7.⚖️ 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) False (b) True
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) False (b) True
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we change it (c) we measure it
10. 10.True or false: a flagpole uses a pulley. (a) False (b) True
11. 11.⚙️ Which of these is a lever? (a) a flagpole (b) a doorknob (c) a steering wheel (d) a spoon lifting a lid
12. 12.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it could fall on you (c) it is magnetic (d) it might sing
13. 13.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) double (d) the same
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) a pencil (d) a balloon
15. 15.⚖️ 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 keep it the same (c) we change it
16. 16.⚙️ Which of these is a wheel and axle? (a) a crane (b) a spoon lifting a lid (c) a doorknob (d) a well pulley
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) how hard we must pull (c) the same string (d) number of pulleys
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) a battery cell (d) a small paper cup
19. 19.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
20. 20.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it can hurt your finger (d) it gets wet
21. 21.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
22. 22.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
23. 23.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) the same (d) impossible
24. 24.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) in the tap (c) on the flagpole (d) on the blackboard
25. 25.⚖️ 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) True (b) False
26. 26.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
27. 27.⚖️ 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
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 keep it the same (b) we measure it (c) we change it
29. 29.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a doorknob (c) a crane (d) a sloping road
30. 30.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) up (c) sideways (d) in a circle
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) True (b) False
32. 32.True or false: a doorknob is a wheel and axle. (a) True (b) False
33. 33.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a bottle opener (c) a crowbar (d) a ramp
34. 34.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the rope gets shorter (c) water gets lighter (d) the bucket floats
35. 35.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a bottle opener (c) a slide (d) a see-saw
36. 36.True or false: a slide is an inclined plane. (a) True (b) False
37. 37.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
38. 38.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
39. 39.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
40. 40.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True

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