Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 404 · 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: a well pulley uses a pulley. (a) False (b) True
2. 2.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 5 cm (c) 40 cm (d) 10 cm
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a battery cell (c) an empty thread reel (d) coins as the load
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) coins as the load (c) a magnet (d) string
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) True (b) False
6. 6.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
7. 7.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
8. 8.⚖️ 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 same string (c) how hard we must pull
9. 9.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same cup of coins (b) number of pulleys (c) the same string (d) how hard we must pull
12. 12.⚖️ 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) how hard we must pull (c) number of pulleys (d) the lifting height
13. 13.🛟 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
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) False (b) True
15. 15.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
16. 16.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a mirror (c) an empty thread reel (d) a pencil
18. 18.⚖️ 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 keep it the same (c) we change it
19. 19.🛟 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
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) a battery cell (d) an empty thread reel
21. 21.⚖️ 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
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) a mirror (d) a small paper cup
23. 23.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) turmeric powder (d) coins as the load
24. 24.True or false: a bottle opener is a lever. (a) True (b) False
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) turmeric powder (d) string
26. 26.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) in a circle (c) sideways (d) up
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the lifting height (b) number of pulleys (c) how hard we must pull
28. 28.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
29. 29.⚙️ Which of these is a lever? (a) a ramp (b) a doorknob (c) a spoon lifting a lid (d) a crane
30. 30.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
31. 31.True or false: a flagpole is a wheel and axle. (a) False (b) True
32. 32.⚙️ Which of these is an inclined plane? (a) a ramp (b) a well pulley (c) a crane (d) a spoon lifting a lid
33. 33.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
34. 34.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) the same (d) easier
35. 35.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
36. 36.⚙️ Which of these uses a pulley? (a) a see-saw (b) a bottle opener (c) a steering wheel (d) a flagpole
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) yeast (d) an empty thread reel
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a pencil (d) a balloon
40. 40.⚖️ 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) False (b) True

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