Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 869 · 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.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a mirror (c) coins as the load (d) a pencil
2. 2.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a tap handle (c) a slide (d) a well pulley
3. 3.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it could fall on you (d) it is magnetic
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.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
6. 6.True or false: a crane is an inclined plane. (a) False (b) True
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) False (b) True
8. 8.True or false: a ramp is an inclined plane. (a) False (b) True
9. 9.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) halves the weight (d) adds weight
10. 10.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) coins as the load (c) a battery cell (d) yeast
11. 11.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) double (d) zero
12. 12.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
13. 13.⚖️ 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
14. 14.⚖️ 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
15. 15.⚙️ Which simple machine is a ramp? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
16. 16.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) pulling down is easier (c) the rope gets shorter (d) water gets lighter
17. 17.⚖️ 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 lifting height (c) the same string (d) how hard we must pull
18. 18.⚙️ Which simple machine is a crowbar? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
21. 21.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a sloping road (c) a crane (d) a tap handle
22. 22.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
23. 23.True or false: a well pulley uses a pulley. (a) True (b) False
24. 24.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
25. 25.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a battery cell (c) a pencil (d) a mirror
27. 27.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
28. 28.⚖️ 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
29. 29.🏗️ 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
30. 30.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
31. 31.⚙️ Which simple machine is a tap handle? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
32. 32.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
33. 33.⚙️ Which of these is an inclined plane? (a) a ramp (b) a see-saw (c) a steering wheel (d) a bottle opener
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) string (c) turmeric powder (d) a mirror
35. 35.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a spoon lifting a lid (c) a flagpole (d) a doorknob
36. 36.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
37. 37.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) yeast (d) a small paper cup
39. 39.⚖️ 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
40. 40.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a magnet (c) an empty thread reel (d) a pencil

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