Pulley STEM Project Worksheet

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

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