Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 173 · 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.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it gets hot (d) it might sing
2. 2.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
3. 3.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 10 cm (d) 5 cm
4. 4.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
5. 5.⚖️ 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
6. 6.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
7. 7.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
8. 8.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a crane (c) a doorknob (d) a flagpole
9. 9.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
10. 10.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
11. 11.True or false: a well pulley is a wheel and axle. (a) False (b) True
12. 12.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) string (c) an empty thread reel (d) a small paper cup
14. 14.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
15. 15.⚙️ Which of these is a lever? (a) a well pulley (b) a crane (c) a doorknob (d) a bottle opener
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a magnet (c) string (d) an empty thread reel
17. 17.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
18. 18.⚖️ 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
19. 19.True or false: a crane is a wheel and axle. (a) True (b) False
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) the same cup of coins (c) number of pulleys (d) how hard we must pull
21. 21.⚖️ 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) the lifting height (c) how hard we must pull
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) string (d) a balloon
23. 23.⚙️ Which of these is a lever? (a) a crowbar (b) a flagpole (c) a ramp (d) a slide
24. 24.⚖️ 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
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) a small paper cup (d) an empty thread reel
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) a mirror (d) an empty thread reel
27. 27.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
28. 28.True or false: a slide is a lever. (a) False (b) True
29. 29.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
30. 30.True or false: a steering wheel is a wheel and axle. (a) False (b) True
31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a pencil (d) a battery cell
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a battery cell (c) a pencil (d) a mirror
33. 33.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
34. 34.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) pulling down is easier (d) water gets lighter
35. 35.🏗️ 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
36. 36.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
37. 37.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
38. 38.True or false: a spoon lifting a lid is a lever. (a) False (b) True
39. 39.True or false: a doorknob is a wheel and axle. (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 cup of coins”? (a) we measure it (b) we change it (c) we keep it the same

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