Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 465 · 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.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it gets longer (d) it turns blue
2. 2.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it is magnetic (d) it gets hot
3. 3.⚖️ 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) the lifting height (c) how hard we must pull
4. 4.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
5. 5.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) down (c) in a circle (d) up
6. 6.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a see-saw (c) a sloping road (d) a crowbar
7. 7.⚖️ 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
8. 8.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
9. 9.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we measure it (c) we keep it the same
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) coins as the load (d) yeast
12. 12.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) zero (d) double
13. 13.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 10 cm (d) 40 cm
14. 14.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
15. 15.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
16. 16.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a crane (c) a bottle opener (d) a steering wheel
17. 17.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) makes it magnetic (d) changes pull direction
18. 18.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a crowbar (c) a spoon lifting a lid (d) a flagpole
19. 19.⚖️ 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 lifting height (c) number of pulleys (d) the same string
20. 20.True or false: a flagpole is a wheel and axle. (a) False (b) True
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a small paper cup (c) a mirror (d) a balloon
22. 22.⚖️ 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) False (b) True
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a magnet (c) a mirror (d) turmeric powder
24. 24.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
25. 25.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
26. 26.True or false: a spoon lifting a lid is a lever. (a) False (b) True
27. 27.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
28. 28.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
29. 29.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
31. 31.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
32. 32.⚖️ 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
33. 33.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
34. 34.⚙️ Which simple machine is a crane? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
35. 35.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) pulling down is easier (c) the bucket floats (d) the rope gets shorter
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) coins as the load (c) yeast (d) a small paper cup
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
38. 38.⚖️ 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
39. 39.⚙️ Which of these uses a pulley? (a) a crowbar (b) a sloping road (c) a doorknob (d) a well pulley
40. 40.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False

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