Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 526 · 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.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
2. 2.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) yeast (c) a pencil (d) a battery cell
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
5. 5.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
6. 6.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) the same cup of coins (c) the lifting height (d) the same string
8. 8.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
9. 9.⚖️ 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
10. 10.⚖️ 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
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a battery cell (c) string (d) a pencil
12. 12.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) in a circle (d) down
13. 13.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) adds weight (d) makes it magnetic
14. 14.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it gets hot (d) it is magnetic
15. 15.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) the same (d) easier
16. 16.⚖️ 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 lifting height (c) the same cup of coins (d) the same string
17. 17.⚙️ Which of these uses a pulley? (a) a flagpole (b) a slide (c) a crowbar (d) a bottle opener
18. 18.⚙️ Which of these is a lever? (a) a slide (b) a tap handle (c) a spoon lifting a lid (d) a flagpole
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) string (d) coins as the load
20. 20.True or false: turmeric powder is not needed for the thread-reel pulley. (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) the same string (c) number of pulleys
22. 22.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 20 cm (d) 10 cm
23. 23.True or false: a bottle opener is a lever. (a) False (b) True
24. 24.True or false: a tap handle is an inclined plane. (a) True (b) False
25. 25.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the bucket floats (c) the rope gets shorter (d) water gets lighter
26. 26.⚙️ Which of these uses a pulley? (a) a crane (b) a see-saw (c) a sloping road (d) a ramp
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) yeast (d) an empty thread reel
28. 28.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
29. 29.⚙️ Which of these is a lever? (a) a flagpole (b) a crowbar (c) a sloping road (d) a well pulley
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we measure it (c) we change it
31. 31.True or false: a sloping road is a wheel and axle. (a) False (b) True
32. 32.True or false: a slide uses a pulley. (a) True (b) False
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a battery cell (c) coins as the load (d) turmeric powder
34. 34.⚖️ 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) True (b) False
35. 35.⚖️ 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
36. 36.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
37. 37.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a small paper cup (d) a mirror
39. 39.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) yeast (c) a balloon (d) a magnet

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