Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 99 · 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? True or false: the same cup of coins is kept the same. (a) True (b) False
2. 2.⚖️ 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 measure it (c) we keep it the same
3. 3.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 5 cm (c) 20 cm (d) 10 cm
4. 4.True or false: a well pulley is a lever. (a) True (b) False
5. 5.True or false: a tap handle uses a pulley. (a) False (b) True
6. 6.⚖️ 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 measure it (c) we change it
7. 7.🛟 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
8. 8.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) easier (d) the same
9. 9.⚙️ Which of these uses a pulley? (a) a sloping road (b) a well pulley (c) a spoon lifting a lid (d) a bottle opener
10. 10.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
11. 11.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
12. 12.⚖️ 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) the lifting height (c) number of pulleys (d) how hard we must pull
13. 13.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
14. 14.True or false: a slide is an inclined plane. (a) False (b) True
15. 15.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
16. 16.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a doorknob (c) a see-saw (d) a ramp
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) an empty thread reel (c) string (d) a small paper cup
18. 18.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it might sing (d) it could fall on you
19. 19.⚖️ 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) True (b) False
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) string (d) a mirror
21. 21.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) the same string (c) how hard we must pull (d) number of pulleys
23. 23.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
24. 24.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a well pulley (c) a doorknob (d) a sloping road
25. 25.⚙️ Which of these is a lever? (a) a ramp (b) a tap handle (c) a crowbar (d) a flagpole
26. 26.⚖️ 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
27. 27.⚖️ 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
28. 28.True or false: a crowbar uses a pulley. (a) True (b) False
29. 29.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
30. 30.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) coins as the load (c) a mirror (d) an empty thread reel
31. 31.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
32. 32.⚖️ 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
33. 33.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the rope gets shorter (c) pulling down is easier (d) the bucket floats
34. 34.True or false: a ramp is an inclined plane. (a) False (b) True
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a balloon (c) yeast (d) a small paper cup
36. 36.⚙️ Which of these is a lever? (a) a slide (b) a doorknob (c) a ramp (d) a spoon lifting a lid
37. 37.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
38. 38.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
39. 39.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
40. 40.⚖️ 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

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