Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 821 · 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 might sing (d) it could fall on you
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
3. 3.⚖️ 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) False (b) True
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a battery cell (c) yeast (d) a pencil
5. 5.⚙️ Which of these uses a pulley? (a) a doorknob (b) a bottle opener (c) a flagpole (d) a crowbar
6. 6.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it gets wet (d) it turns blue
7. 7.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) impossible (d) harder
8. 8.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
9. 9.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
10. 10.True or false: a crane uses a pulley. (a) True (b) False
11. 11.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 5 cm (d) 40 cm
12. 12.🧺 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) a pencil (d) a magnet
13. 13.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
14. 14.⚙️ Which simple machine is a flagpole? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
15. 15.⚙️ Which simple machine is a well pulley? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) a pencil (c) string (d) a small paper cup
17. 17.⚖️ 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 change it (c) we measure it
18. 18.⚖️ 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 same cup of coins
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a balloon (c) an empty thread reel (d) a small paper cup
20. 20.⚖️ 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
21. 21.True or false: a tap handle is a wheel and axle. (a) True (b) False
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) the same string (c) how hard we must pull (d) the same cup of coins
23. 23.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
24. 24.True or false: a crane is an inclined plane. (a) True (b) False
25. 25.⚙️ Which simple machine is a tap handle? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
26. 26.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a well pulley (c) a crowbar (d) a doorknob
27. 27.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
28. 28.⚖️ 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
29. 29.🏗️ 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
30. 30.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
31. 31.⚙️ Which of these is a lever? (a) a see-saw (b) a tap handle (c) a sloping road (d) a steering wheel
32. 32.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
33. 33.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a crane (c) a bottle opener (d) a ramp
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) True (b) False
35. 35.⚖️ 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 measure it (b) we keep it the same (c) we change it
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) turmeric powder (c) an empty thread reel (d) coins as the load
37. 37.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
38. 38.True or false: a sloping road is an inclined plane. (a) False (b) True
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a mirror (c) string (d) a balloon
40. 40.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) makes it magnetic (c) adds weight (d) halves the weight

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