Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 796 · 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 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
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “how hard we must pull”? (a) we change it (b) we measure it (c) we keep it the same
3. 3.⚖️ 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
4. 4.⚙️ Which simple machine is a slide? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
5. 5.True or false: a steering wheel is a wheel and axle. (a) True (b) False
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) turmeric powder (c) coins as the load (d) an empty thread reel
7. 7.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
8. 8.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a balloon (c) a small paper cup (d) a pencil
10. 10.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
11. 11.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
12. 12.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) in a circle (c) sideways (d) down
13. 13.⚖️ 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 same string (c) how hard we must pull
14. 14.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
15. 15.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
16. 16.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it gets wet (d) it turns blue
17. 17.⚖️ 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
18. 18.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) the same (d) zero
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) False (b) True
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 measure it (b) we keep it the same (c) we change it
21. 21.True or false: a ramp is a lever. (a) False (b) True
22. 22.True or false: a bottle opener is a lever. (a) False (b) True
23. 23.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) coins as the load (c) yeast (d) string
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) yeast (d) coins as the load
26. 26.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
27. 27.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
28. 28.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
29. 29.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) coins as the load (c) a pencil (d) a small paper cup
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) False (b) True
31. 31.True or false: a tap handle uses a pulley. (a) True (b) False
32. 32.⚖️ 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) the same string (d) the lifting height
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) coins as the load (c) a small paper cup (d) string
34. 34.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
35. 35.🛟 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
36. 36.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
37. 37.True or false: coins as the load is not 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 what we measure. (a) False (b) True
39. 39.True or false: a well pulley is a lever. (a) False (b) True
40. 40.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever

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