Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 400 · 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? What do we do with “number of pulleys”? (a) we measure it (b) we keep it the same (c) we change it
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) the same (d) zero
3. 3.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it might sing (d) it could fall on you
4. 4.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it gets wet (d) it can hurt your finger
5. 5.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) sideways (c) in a circle (d) up
6. 6.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a battery cell (c) coins as the load (d) a small paper cup
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
9. 9.⚖️ 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
10. 10.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a magnet (c) coins as the load (d) a battery cell
11. 11.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
12. 12.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) easier (d) the same
13. 13.True or false: a steering wheel is a wheel and axle. (a) True (b) False
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we change it (c) we measure it
15. 15.True or false: a spoon lifting a lid is a lever. (a) False (b) True
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 same string (b) the same cup of coins (c) how hard we must pull (d) number of pulleys
17. 17.⚖️ 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
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) True (b) False
19. 19.⚖️ 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) how hard we must pull (c) the same cup of coins (d) the same string
20. 20.🔮 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
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) False (b) True
22. 22.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) turmeric powder (c) a small paper cup (d) a pencil
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) coins as the load (c) a pencil (d) a balloon
25. 25.True or false: a bottle opener is a lever. (a) False (b) True
26. 26.⚙️ Which of these uses a pulley? (a) a slide (b) a bottle opener (c) a steering wheel (d) a well pulley
27. 27.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a pencil (d) a mirror
29. 29.⚖️ 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) True (b) False
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a mirror (c) a small paper cup (d) a balloon
31. 31.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) nail (c) rope (d) magnet
32. 32.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
33. 33.True or false: a tap handle is a wheel and axle. (a) False (b) True
34. 34.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
35. 35.⚙️ Which simple machine is a sloping road? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
36. 36.⚙️ Which of these uses a pulley? (a) a slide (b) a spoon lifting a lid (c) a crane (d) a crowbar
37. 37.⚙️ Which of these is a lever? (a) a bottle opener (b) a slide (c) a crane (d) a tap handle
38. 38.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a well pulley (c) a spoon lifting a lid (d) a ramp
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we change it (c) we measure it
40. 40.⚖️ 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

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