Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 484 · 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.⚖️ 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
2. 2.⚖️ 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
3. 3.⚙️ Which simple machine is a sloping road? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we measure it (c) we change it
5. 5.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
6. 6.⚖️ 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 keep it the same (b) we measure it (c) we change it
7. 7.⚖️ 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) True (b) False
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a pencil (c) a battery cell (d) a magnet
9. 9.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets wet (d) it gets longer
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a mirror (c) string (d) a pencil
11. 11.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) the same cup of coins (c) the same string (d) number of pulleys
13. 13.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) the same (d) double
14. 14.🏗️ 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
15. 15.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) the bucket floats (c) pulling down is easier (d) water gets lighter
16. 16.True or false: a flagpole is a wheel and axle. (a) True (b) False
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
18. 18.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
20. 20.True or false: a well pulley is a lever. (a) False (b) True
21. 21.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a ramp (c) a tap handle (d) a spoon lifting a lid
22. 22.⚖️ 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 keep it the same (c) we change it
23. 23.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
24. 24.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
25. 25.⚙️ Which of these is a lever? (a) a flagpole (b) a well pulley (c) a crowbar (d) a tap handle
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) coins as the load (c) string (d) a small paper cup
27. 27.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) in the tap (c) on the flagpole (d) on the bench
28. 28.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
29. 29.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) string (c) a pencil (d) a small paper cup
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) the same cup of coins (c) how hard we must pull (d) number of pulleys
31. 31.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
32. 32.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) rope (c) battery (d) magnet
33. 33.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
34. 34.⚙️ Which of these uses a pulley? (a) a well pulley (b) a ramp (c) a see-saw (d) a spoon lifting a lid
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a mirror (c) an empty thread reel (d) a magnet
36. 36.⚙️ Which of these is a wheel and axle? (a) a slide (b) a sloping road (c) a crane (d) a tap handle
37. 37.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) impossible (d) the same
38. 38.True or false: a see-saw is a lever. (a) False (b) True
39. 39.⚙️ Which simple machine is a flagpole? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
40. 40.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False

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