Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 721 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a balloon (c) coins as the load (d) string
2. 2.⚙️ Which of these is a lever? (a) a sloping road (b) a crowbar (c) a doorknob (d) a tap handle
3. 3.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
4. 4.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it could fall on you (d) it gets hot
5. 5.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) up (d) down
6. 6.⚖️ 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) how hard we must pull (c) the lifting height (d) the same cup of coins
7. 7.True or false: a flagpole is a lever. (a) False (b) True
8. 8.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
9. 9.⚖️ 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
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we keep it the same (c) we measure it
11. 11.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
12. 12.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
13. 13.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a magnet (c) a small paper cup (d) a balloon
15. 15.⚖️ 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 measure it (b) we change it (c) we keep it the same
16. 16.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
17. 17.⚖️ 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
18. 18.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) makes it magnetic (d) changes pull direction
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
20. 20.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) magnet (c) rope (d) battery
21. 21.⚙️ Which of these uses a pulley? (a) a flagpole (b) a crowbar (c) a sloping road (d) a steering wheel
22. 22.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) how hard we must pull (c) the same string (d) the same cup of coins
24. 24.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
25. 25.True or false: a sloping road is an inclined plane. (a) True (b) False
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
27. 27.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
28. 28.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) string (c) a small paper cup (d) a battery cell
29. 29.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) an empty thread reel (d) a battery cell
30. 30.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
31. 31.True or false: a see-saw is a lever. (a) False (b) True
32. 32.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
33. 33.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
34. 34.⚖️ 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
35. 35.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) an empty thread reel (c) string (d) a pencil
37. 37.⚖️ 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 change it (c) we measure it
38. 38.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
39. 39.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
40. 40.⚖️ 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 measure it (c) we change it

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