Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 763 · 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.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
2. 2.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a doorknob (c) a spoon lifting a lid (d) a ramp
3. 3.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) coins as the load (d) a balloon
5. 5.⚖️ 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 same cup of coins (c) how hard we must pull
6. 6.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
7. 7.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
8. 8.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a steering wheel (c) a see-saw (d) a well pulley
9. 9.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
10. 10.🧺 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 balloon (d) coins as the load
11. 11.⚙️ Which of these is a lever? (a) a flagpole (b) a slide (c) a well pulley (d) a crowbar
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) yeast (c) a balloon (d) string
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) turmeric powder (c) coins as the load (d) a pencil
14. 14.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a slide (c) a flagpole (d) a ramp
15. 15.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it gets longer (d) it can hurt your finger
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 keep it the same (b) we measure it (c) we change it
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) the lifting height (c) number of pulleys (d) the same cup of coins
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a small paper cup (d) a battery cell
19. 19.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
20. 20.⚖️ 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
21. 21.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 5 cm (c) 20 cm (d) 10 cm
22. 22.⚖️ 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
23. 23.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
24. 24.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) double (d) the same
25. 25.True or false: a flagpole is a wheel and axle. (a) False (b) True
26. 26.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) rope (c) nail (d) battery
27. 27.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it might sing (d) it gets hot
28. 28.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
29. 29.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
30. 30.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) down (c) sideways (d) in a circle
31. 31.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) the same (d) harder
32. 32.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
33. 33.True or false: a ramp is an inclined plane. (a) False (b) True
34. 34.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
35. 35.⚙️ Which of these is a lever? (a) a crane (b) a sloping road (c) a bottle opener (d) a steering wheel
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a mirror (c) string (d) coins as the load
37. 37.⚖️ 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 change it (c) we measure it
38. 38.⚖️ 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) False (b) True
39. 39.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
40. 40.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False

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