Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 499 · 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 is needed for the thread-reel pulley? (a) a battery cell (b) coins as the load (c) a mirror (d) turmeric powder
2. 2.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) down (d) sideways
3. 3.⚖️ 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
4. 4.⚙️ Which of these is a lever? (a) a doorknob (b) a flagpole (c) a bottle opener (d) a sloping road
5. 5.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it might sing (d) it is magnetic
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we keep it the same (c) we measure it
7. 7.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) double (d) about half
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) a magnet (d) a pencil
9. 9.⚖️ 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
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) a pencil (c) a small paper cup (d) an empty thread reel
11. 11.⚙️ Which simple machine is a ramp? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
12. 12.⚙️ Which simple machine is a slide? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
13. 13.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) impossible (d) the same
14. 14.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) the same cup of coins (c) how hard we must pull (d) number of pulleys
16. 16.⚖️ 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
17. 17.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a bottle opener (c) a crane (d) a doorknob
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
19. 19.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets wet (d) it gets longer
20. 20.⚖️ 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
21. 21.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
22. 22.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) yeast (c) a battery cell (d) string
23. 23.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a doorknob (c) a steering wheel (d) a sloping road
24. 24.True or false: a slide is a lever. (a) True (b) False
25. 25.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
26. 26.True or false: a slide is an inclined plane. (a) True (b) False
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a balloon (c) turmeric powder (d) a magnet
28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a battery cell (c) a magnet (d) turmeric powder
29. 29.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
30. 30.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 40 cm (d) 5 cm
31. 31.⚙️ Which of these is a wheel and axle? (a) a crane (b) a flagpole (c) a slide (d) a tap handle
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) a small paper cup (c) coins as the load (d) an empty thread reel
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a mirror (c) coins as the load (d) string
34. 34.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
35. 35.True or false: a bottle opener is a lever. (a) True (b) False
36. 36.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
37. 37.True or false: a ramp is an inclined plane. (a) False (b) True
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) string (d) turmeric powder
39. 39.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) a battery cell (d) a pencil
40. 40.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True

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