Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 268 · 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 a lever? (a) a see-saw (b) a flagpole (c) a sloping road (d) a tap handle
2. 2.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it could fall on you (d) it gets hot
3. 3.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) rope (d) nail
4. 4.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) the same (d) easier
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) yeast (c) a pencil (d) a small paper cup
7. 7.True or false: a well pulley is a wheel and axle. (a) False (b) True
8. 8.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a sloping road (c) a spoon lifting a lid (d) a flagpole
9. 9.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) False (b) True
11. 11.⚖️ 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
12. 12.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a ramp (c) a crowbar (d) a steering wheel
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a magnet (c) turmeric powder (d) a balloon
14. 14.🧺 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) a balloon (d) a pencil
15. 15.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) a battery cell (d) coins as the load
16. 16.⚙️ Which of these uses a pulley? (a) a ramp (b) a steering wheel (c) a well pulley (d) a see-saw
17. 17.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
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) number of pulleys (b) the same cup of coins (c) how hard we must pull (d) the lifting height
19. 19.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a spoon lifting a lid (c) a crane (d) a crowbar
20. 20.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) adds weight (c) makes it magnetic (d) halves the weight
21. 21.True or false: a bottle opener is a wheel and axle. (a) False (b) True
22. 22.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the rope gets shorter (c) the bucket floats (d) water gets lighter
23. 23.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) a magnet (d) string
25. 25.⚙️ Which of these is a lever? (a) a crowbar (b) a slide (c) a crane (d) a sloping road
26. 26.⚖️ 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 measure it (b) we change it (c) we keep it the same
27. 27.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
28. 28.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
29. 29.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) in a circle (d) down
30. 30.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we keep it the same (c) we measure it
32. 32.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) double (d) zero
33. 33.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
34. 34.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
35. 35.True or false: a flagpole is an inclined plane. (a) False (b) True
36. 36.⚖️ 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
37. 37.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it can hurt your finger (d) it gets wet
38. 38.⚙️ Which simple machine is a flagpole? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
39. 39.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
40. 40.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False

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