Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 416 · 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? Which of these is the one thing we change? (a) the same string (b) the same cup of coins (c) number of pulleys (d) how hard we must pull
2. 2.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 40 cm (d) 20 cm
3. 3.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it gets hot (d) it is magnetic
4. 4.⚙️ Which simple machine is a doorknob? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
5. 5.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) impossible (d) harder
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 string (b) the same cup of coins (c) number of pulleys (d) how hard we must pull
7. 7.True or false: string is needed for the thread-reel pulley. (a) False (b) True
8. 8.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) an empty thread reel (c) a pencil (d) coins as the load
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a small paper cup (c) a battery cell (d) yeast
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we keep it the same (c) we measure it
13. 13.⚙️ Which of these is an inclined plane? (a) a ramp (b) a doorknob (c) a flagpole (d) a well pulley
14. 14.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
15. 15.True or false: a tap handle is an inclined plane. (a) False (b) True
16. 16.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) yeast (c) string (d) a small paper cup
18. 18.True or false: a flagpole is a lever. (a) True (b) False
19. 19.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) the same (d) double
20. 20.⚖️ 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
21. 21.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
22. 22.True or false: a ramp is an inclined plane. (a) True (b) False
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) coins as the load (d) a magnet
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) a small paper cup (d) yeast
25. 25.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
26. 26.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a flagpole (c) a slide (d) a spoon lifting a lid
27. 27.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
28. 28.True or false: a steering wheel is an inclined plane. (a) False (b) True
29. 29.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
30. 30.⚖️ 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) True (b) False
31. 31.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
32. 32.True or false: a well pulley uses a pulley. (a) True (b) False
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) coins as the load (d) a balloon
34. 34.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
35. 35.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it can hurt your finger (d) it turns blue
36. 36.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
37. 37.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
39. 39.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a sloping road (c) a tap handle (d) a crane
40. 40.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) in a circle (c) down (d) sideways

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