Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 370 · 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) sideways (b) down (c) in a circle (d) up
2. 2.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it can hurt your finger (d) it gets longer
3. 3.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a bottle opener (c) a spoon lifting a lid (d) a flagpole
4. 4.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) double (d) the same
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) the same cup of coins (c) number of pulleys (d) the same string
6. 6.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a crane (c) a see-saw (d) a doorknob
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
8. 8.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) magnet (c) battery (d) rope
9. 9.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
10. 10.True or false: a see-saw uses a pulley. (a) False (b) True
11. 11.True or false: a slide is an inclined plane. (a) True (b) False
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) turmeric powder (c) a balloon (d) yeast
13. 13.⚖️ 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) True (b) False
14. 14.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
15. 15.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
16. 16.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it gets hot (d) it could fall on you
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) coins as the load (d) a battery cell
18. 18.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
19. 19.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a crowbar (c) a doorknob (d) a ramp
20. 20.True or false: a well pulley is a lever. (a) True (b) False
21. 21.⚖️ 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
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) a pencil (d) a balloon
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) number of pulleys (c) the lifting height (d) how hard we must pull
24. 24.⚖️ 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
25. 25.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 5 cm (d) 10 cm
26. 26.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
27. 27.True or false: string is needed for the thread-reel pulley. (a) False (b) True
28. 28.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
29. 29.True or false: a flagpole is a wheel and axle. (a) True (b) False
30. 30.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) a battery cell (d) string
32. 32.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
33. 33.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
34. 34.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a flagpole (c) a see-saw (d) a crane
35. 35.⚖️ 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 measure it (c) we change it
36. 36.⚙️ Which of these is an inclined plane? (a) a crane (b) a slide (c) a well pulley (d) a steering wheel
37. 37.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) easier (d) the same
38. 38.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) yeast (d) a pencil
40. 40.⚙️ Which of these is a lever? (a) a well pulley (b) a flagpole (c) a sloping road (d) a bottle opener

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