Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 19 · 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.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) adds weight (d) changes pull direction
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.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a doorknob (c) a slide (d) a well pulley
4. 4.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) about half (d) double
5. 5.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it turns blue (d) it gets longer
6. 6.⚖️ 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 lifting height
7. 7.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) string (c) a mirror (d) a balloon
8. 8.⚙️ Which of these is a lever? (a) a ramp (b) a well pulley (c) a tap handle (d) a spoon lifting a lid
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a balloon (d) a pencil
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) string (d) a mirror
11. 11.True or false: a slide is a lever. (a) False (b) True
12. 12.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
13. 13.🛟 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
14. 14.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) water gets lighter (d) pulling down is easier
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a battery cell (c) a mirror (d) a pencil
16. 16.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a spoon lifting a lid (c) a crane (d) a bottle opener
17. 17.True or false: a bottle opener is a lever. (a) False (b) True
18. 18.⚙️ Which of these is a lever? (a) a well pulley (b) a see-saw (c) a flagpole (d) a crane
19. 19.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
20. 20.True or false: a spoon lifting a lid is a lever. (a) False (b) True
21. 21.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
22. 22.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
23. 23.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
24. 24.⚖️ 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
25. 25.⚙️ Which of these is a lever? (a) a crowbar (b) a flagpole (c) a sloping road (d) a steering wheel
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) the lifting height (c) how hard we must pull (d) number of pulleys
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a magnet (c) string (d) a pencil
28. 28.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
29. 29.True or false: a slide is an inclined plane. (a) True (b) False
30. 30.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
31. 31.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) a small paper cup (d) a magnet
33. 33.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
34. 34.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) coins as the load (c) an empty thread reel (d) a small paper cup
36. 36.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) a balloon (d) a pencil
38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a battery cell (c) a mirror (d) an empty thread reel
39. 39.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) the same (d) easier
40. 40.True or false: string is not needed for the thread-reel pulley. (a) False (b) True

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