Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 811 · 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.⚙️ Which of these uses a pulley? (a) a see-saw (b) a doorknob (c) a slide (d) a crane
2. 2.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) nail (c) rope (d) battery
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) an empty thread reel (d) a battery cell
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a mirror (c) a pencil (d) a small paper cup
5. 5.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) the same (d) zero
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 measure it (b) we keep it the same (c) we change it
7. 7.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
8. 8.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a spoon lifting a lid (c) a sloping road (d) a steering wheel
9. 9.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
10. 10.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a flagpole (c) a steering wheel (d) a crowbar
11. 11.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) yeast (c) coins as the load (d) a small paper cup
13. 13.⚖️ 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) the same cup of coins (c) the same string (d) how hard we must pull
14. 14.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) string (c) a battery cell (d) a mirror
16. 16.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
17. 17.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
18. 18.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
19. 19.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it gets hot (d) it might sing
20. 20.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
21. 21.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
22. 22.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
23. 23.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
24. 24.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a balloon (c) a magnet (d) a mirror
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (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 the one thing we change. (a) False (b) True
28. 28.True or false: a sloping road is a wheel and axle. (a) False (b) True
29. 29.True or false: a pencil 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 same cup of coins is what we measure. (a) False (b) True
31. 31.⚖️ 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) True (b) False
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the same cup of coins
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a mirror (c) a balloon (d) coins as the load
34. 34.⚖️ 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) False (b) True
35. 35.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it gets wet (d) it turns blue
36. 36.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 5 cm (c) 10 cm (d) 20 cm
37. 37.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
38. 38.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
39. 39.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
40. 40.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True

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