Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 147 · 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 pencil (b) a mirror (c) a battery cell (d) a balloon
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) double (d) zero
3. 3.🧺 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 battery cell
4. 4.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 5 cm (c) 10 cm (d) 20 cm
5. 5.True or false: a sloping road is an inclined plane. (a) True (b) False
6. 6.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) pulling down is easier (c) the bucket floats (d) the rope gets shorter
7. 7.True or false: a spoon lifting a lid is a lever. (a) False (b) True
8. 8.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a see-saw (c) a sloping road (d) a steering wheel
9. 9.⚖️ 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
10. 10.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
11. 11.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
12. 12.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
13. 13.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it can hurt your finger (d) it turns blue
14. 14.True or false: a see-saw uses a pulley. (a) False (b) True
15. 15.True or false: a slide is an inclined plane. (a) False (b) True
16. 16.True or false: a ramp uses a pulley. (a) False (b) True
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same cup of coins”? (a) we change it (b) we measure it (c) we keep it the same
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) number of pulleys (c) the same string (d) the same cup of coins
19. 19.⚖️ 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
20. 20.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
21. 21.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
22. 22.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) halves the weight (d) changes pull direction
23. 23.⚙️ Which simple machine is a flagpole? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
24. 24.True or false: a sloping road is a lever. (a) False (b) True
25. 25.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it is magnetic (d) it gets hot
26. 26.⚖️ 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) the same cup of coins (c) number of pulleys
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a balloon (c) a pencil (d) a small paper cup
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a magnet (d) a pencil
29. 29.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
30. 30.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) easier (d) impossible
31. 31.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
32. 32.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
33. 33.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
34. 34.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
35. 35.⚙️ Which of these uses a pulley? (a) a see-saw (b) a spoon lifting a lid (c) a ramp (d) a flagpole
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) coins as the load (c) a pencil (d) an empty thread reel
37. 37.⚖️ 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
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a mirror (d) coins as the load
39. 39.⚖️ 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 same cup of coins (c) how hard we must pull (d) number of pulleys
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we change it (c) we keep it the same

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