Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 157 · 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 never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it could fall on you (d) it might sing
2. 2.⚖️ 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
3. 3.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) magnet (d) nail
4. 4.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 10 cm (c) 5 cm (d) 40 cm
5. 5.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
6. 6.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) an empty thread reel (d) a battery cell
8. 8.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) about half (d) zero
9. 9.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the rope gets shorter (c) pulling down is easier (d) the bucket floats
10. 10.🏗️ 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
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) False (b) True
12. 12.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a crowbar (c) a doorknob (d) a ramp
13. 13.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
14. 14.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
15. 15.True or false: a ramp is a wheel and axle. (a) True (b) False
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a balloon (c) an empty thread reel (d) a battery cell
17. 17.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
18. 18.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
19. 19.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
20. 20.True or false: a slide is an inclined plane. (a) True (b) False
21. 21.⚖️ 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 same string (c) the lifting height (d) number of pulleys
22. 22.⚖️ 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) True (b) False
23. 23.🧺 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
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we measure it (c) we change it
25. 25.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a bottle opener (c) a spoon lifting a lid (d) a tap handle
26. 26.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) harder (d) easier
27. 27.True or false: a see-saw uses a pulley. (a) False (b) True
28. 28.⚙️ Which of these is an inclined plane? (a) a crane (b) a see-saw (c) a tap handle (d) a slide
29. 29.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) coins as the load (d) a magnet
30. 30.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
31. 31.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a battery cell (c) a mirror (d) string
33. 33.⚖️ 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
34. 34.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets wet (c) it turns blue (d) it gets longer
35. 35.True or false: a see-saw is a wheel and axle. (a) True (b) False
36. 36.True or false: a crowbar is a lever. (a) False (b) True
37. 37.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a battery cell (c) yeast (d) a small paper cup
38. 38.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) yeast (d) a small paper cup
40. 40.⚖️ 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) False (b) True

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