Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 936 · 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 uses a pulley? (a) a flagpole (b) a sloping road (c) a doorknob (d) a crowbar
2. 2.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a magnet (c) string (d) a small paper cup
4. 4.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) nail (c) battery (d) magnet
5. 5.⚙️ Which simple machine is a tap handle? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
6. 6.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a crane (c) a spoon lifting a lid (d) a slide
7. 7.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it could fall on you (d) it gets hot
8. 8.⚙️ Which of these uses a pulley? (a) a doorknob (b) a see-saw (c) a well pulley (d) a slide
9. 9.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
10. 10.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) sideways (c) up (d) down
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) coins as the load (d) yeast
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) False (b) True
13. 13.⚖️ 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 keep it the same (c) we measure it
14. 14.⚙️ Which simple machine is a well pulley? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
15. 15.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it can hurt your finger (d) it gets wet
16. 16.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
17. 17.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the lifting height (c) the same cup of coins (d) how hard we must pull
19. 19.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
20. 20.⚖️ 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
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the lifting height
22. 22.⚖️ 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
23. 23.True or false: a well pulley uses a pulley. (a) True (b) False
24. 24.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 10 cm (d) 20 cm
25. 25.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
26. 26.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) easier (d) harder
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a balloon (c) a magnet (d) an empty thread reel
28. 28.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a battery cell (c) string (d) coins as the load
29. 29.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
30. 30.⚙️ Which of these is a wheel and axle? (a) a slide (b) a bottle opener (c) a tap handle (d) a sloping road
31. 31.True or false: a ramp is a lever. (a) False (b) True
32. 32.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
33. 33.⚖️ 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 keep it the same (c) we change it
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) coins as the load (d) a magnet
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
36. 36.🧺 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 small paper cup (d) a balloon
37. 37.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) coins as the load (c) yeast (d) a pencil
39. 39.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
40. 40.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle

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