Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 810 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) an empty thread reel (c) coins as the load (d) string
2. 2.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
3. 3.True or false: a slide is a lever. (a) True (b) False
4. 4.True or false: a well pulley is a lever. (a) True (b) False
5. 5.🧺 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) string (d) a balloon
6. 6.⚖️ 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) the same string (c) how hard we must pull (d) number of pulleys
7. 7.⚖️ 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 string (c) number of pulleys (d) how hard we must pull
8. 8.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) double (d) zero
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) False (b) True
10. 10.True or false: a ramp is an inclined plane. (a) False (b) True
11. 11.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) halves the weight (d) makes it magnetic
12. 12.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 5 cm (d) 20 cm
13. 13.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a doorknob (c) a sloping road (d) a see-saw
14. 14.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
15. 15.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
16. 16.⚙️ Which of these is a lever? (a) a well pulley (b) a tap handle (c) a sloping road (d) a bottle opener
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) yeast (d) string
18. 18.⚙️ Which simple machine is a crane? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
19. 19.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
20. 20.True or false: a sloping road is a lever. (a) True (b) False
21. 21.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) easier (d) harder
22. 22.True or false: a steering wheel is a wheel and axle. (a) True (b) False
23. 23.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
24. 24.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it could fall on you (d) it might sing
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) a balloon (d) a pencil
26. 26.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a battery cell (c) coins as the load (d) a pencil
28. 28.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
29. 29.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
31. 31.🛟 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
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we change it (c) we keep it the same
33. 33.⚙️ Which simple machine is a tap handle? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
34. 34.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
35. 35.True or false: a spoon lifting a lid uses a pulley. (a) False (b) True
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a small paper cup (c) an empty thread reel (d) a mirror
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) True (b) False
38. 38.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a ramp (c) a crane (d) a doorknob
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) string (c) a magnet (d) a mirror
40. 40.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) the bucket floats (c) water gets lighter (d) pulling down is easier

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