Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 662 · 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.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) down (c) sideways (d) up
2. 2.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
3. 3.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it is magnetic (d) it could fall on you
4. 4.⚖️ 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 change it (c) we keep it the same
5. 5.True or false: a slide uses a pulley. (a) False (b) True
6. 6.⚖️ 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 keep it the same (b) we change it (c) we measure it
7. 7.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) pulling down is easier (d) the rope gets shorter
8. 8.⚖️ 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
9. 9.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it gets wet (d) it can hurt your finger
10. 10.⚙️ Which of these is a lever? (a) a crowbar (b) a crane (c) a steering wheel (d) a doorknob
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a magnet (c) yeast (d) a balloon
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) yeast (c) an empty thread reel (d) a small paper cup
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) coins as the load (c) a mirror (d) an empty thread reel
14. 14.⚙️ Which of these uses a pulley? (a) a crowbar (b) a slide (c) a bottle opener (d) a well pulley
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same cup of coins (b) the lifting height (c) the same string (d) number of pulleys
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we keep it the same (c) we measure it
17. 17.⚙️ Which simple machine is a ramp? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
18. 18.True or false: a see-saw uses a pulley. (a) False (b) True
19. 19.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) about half (d) double
20. 20.⚖️ 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
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) how hard we must pull (c) the lifting height
22. 22.True or false: a see-saw is a wheel and axle. (a) True (b) False
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) turmeric powder (d) string
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) a pencil (d) a balloon
25. 25.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
26. 26.True or false: a slide is an inclined plane. (a) False (b) True
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) a pencil (d) a magnet
28. 28.⚙️ Which of these is a lever? (a) a flagpole (b) a see-saw (c) a sloping road (d) a crane
29. 29.⚙️ Which of these is a lever? (a) a tap handle (b) a spoon lifting a lid (c) a well pulley (d) a doorknob
30. 30.True or false: a spoon lifting a lid is a lever. (a) False (b) True
31. 31.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
32. 32.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 10 cm (c) 40 cm (d) 5 cm
33. 33.True or false: a crane uses a pulley. (a) False (b) True
34. 34.⚙️ Which simple machine is a slide? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
35. 35.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) impossible (d) easier
36. 36.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
37. 37.⚖️ 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 change it (b) we measure it (c) we keep it the same
38. 38.⚖️ 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) number of pulleys (c) the same string (d) how hard we must pull
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) True (b) False
40. 40.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle

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