Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 456 · 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.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) the same cup of coins (c) number of pulleys (d) the lifting height
2. 2.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
3. 3.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
4. 4.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) rope (c) nail (d) battery
5. 5.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a see-saw (c) a flagpole (d) a spoon lifting a lid
6. 6.⚖️ 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
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) yeast (d) an empty thread reel
8. 8.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) down (d) up
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) a balloon (d) a pencil
10. 10.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a crowbar (c) a tap handle (d) a ramp
11. 11.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 20 cm (d) 5 cm
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a mirror (c) a magnet (d) an empty thread reel
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we keep it the same (c) we measure it
14. 14.⚖️ 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
15. 15.True or false: a steering wheel is a lever. (a) False (b) True
16. 16.⚙️ Which simple machine is a sloping road? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
17. 17.⚖️ 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) True (b) False
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) coins as the load (c) a magnet (d) yeast
19. 19.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
20. 20.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
21. 21.⚖️ 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) how hard we must pull (c) number of pulleys
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a pencil (d) turmeric powder
23. 23.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) changes pull direction (d) makes it magnetic
24. 24.🧺 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 balloon (d) a pencil
25. 25.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a sloping road (c) a well pulley (d) a crane
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a mirror (c) a magnet (d) turmeric powder
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) a mirror (d) an empty thread reel
28. 28.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
29. 29.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
30. 30.🧺 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) string (d) a battery cell
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.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a balloon (c) string (d) a battery cell
33. 33.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) impossible (d) harder
34. 34.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
35. 35.True or false: a sloping road is an inclined plane. (a) False (b) True
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) string (d) a battery cell
37. 37.True or false: a ramp is a wheel and axle. (a) False (b) True
38. 38.🛟 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
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) a mirror (d) coins as the load
40. 40.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) a small paper cup (c) an empty thread reel (d) string

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