Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 184 · 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.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
2. 2.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) the lifting height (c) how hard we must pull
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) turmeric powder (d) string
5. 5.⚙️ Which simple machine is a sloping road? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) a magnet (d) a pencil
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) number of pulleys (b) how hard we must pull (c) the same cup of coins (d) the same string
8. 8.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) in a circle (c) down (d) sideways
9. 9.⚖️ 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
10. 10.⚖️ 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
11. 11.True or false: a doorknob is a wheel and axle. (a) False (b) True
12. 12.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
13. 13.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
14. 14.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a bottle opener (c) a steering wheel (d) a flagpole
15. 15.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) coins as the load (d) an empty thread reel
16. 16.True or false: a magnet is not needed for the thread-reel 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 string”? (a) we keep it the same (b) we measure it (c) we change it
18. 18.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it gets wet (d) it can hurt your finger
19. 19.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
20. 20.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) changes pull direction (d) halves the weight
21. 21.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
22. 22.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
23. 23.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
24. 24.⚙️ Which simple machine is a ramp? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
25. 25.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
26. 26.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
27. 27.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a flagpole (c) a tap handle (d) a see-saw
28. 28.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
29. 29.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) impossible (d) harder
30. 30.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it could fall on you (c) it is magnetic (d) it might sing
31. 31.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
32. 32.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the bucket floats (c) water gets lighter (d) the rope gets shorter
33. 33.True or false: a see-saw is a lever. (a) True (b) False
34. 34.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
35. 35.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
36. 36.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “how hard we must pull”? (a) we change it (b) we keep it the same (c) we measure it
38. 38.True or false: a bottle opener is a lever. (a) False (b) True
39. 39.True or false: a ramp is an inclined plane. (a) False (b) True
40. 40.True or false: a flagpole uses a pulley. (a) True (b) False

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