Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 252 · 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 “the same string”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) string (d) a balloon
3. 3.⚙️ Which of these uses a pulley? (a) a doorknob (b) a see-saw (c) a crane (d) a bottle opener
4. 4.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it gets longer (d) it can hurt your finger
5. 5.⚖️ 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
6. 6.⚖️ 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) how hard we must pull (c) number of pulleys (d) the lifting height
7. 7.True or false: a doorknob is a wheel and axle. (a) True (b) False
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) coins as the load (c) an empty thread reel (d) a small paper cup
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) a balloon (d) an empty thread reel
10. 10.True or false: a slide is an inclined plane. (a) False (b) True
11. 11.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) harder (d) easier
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a mirror (c) a magnet (d) a battery cell
13. 13.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) down (c) sideways (d) in a circle
14. 14.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
15. 15.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) magnet (c) battery (d) rope
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) True (b) False
18. 18.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) a battery cell (d) a small paper cup
19. 19.⚖️ 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
20. 20.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
21. 21.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
22. 22.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
23. 23.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) about half (d) double
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) a pencil (c) an empty thread reel (d) a small paper cup
25. 25.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it could fall on you (d) it is magnetic
26. 26.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
27. 27.⚖️ 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) number of pulleys (c) the lifting height (d) the same cup of coins
28. 28.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
29. 29.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
30. 30.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
31. 31.🧺 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 magnet (d) a small paper cup
32. 32.True or false: a ramp is an inclined plane. (a) False (b) True
33. 33.⚖️ 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
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
35. 35.True or false: a bottle opener is a lever. (a) False (b) True
36. 36.⚙️ Which of these is a lever? (a) a see-saw (b) a crane (c) a slide (d) a flagpole
37. 37.⚖️ 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
38. 38.⚙️ Which simple machine is a ramp? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
39. 39.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a well pulley (c) a slide (d) a see-saw
40. 40.True or false: a sloping road is a lever. (a) False (b) True

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