Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 625 · 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 simple machine is a slide? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
2. 2.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) changes pull direction (d) halves the weight
3. 3.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
4. 4.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
5. 5.True or false: a crane uses a pulley. (a) False (b) True
6. 6.⚖️ 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 change it (c) we measure it
7. 7.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
8. 8.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
9. 9.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
10. 10.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets longer (d) it gets wet
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) number of pulleys (c) the same string (d) the lifting height
12. 12.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it might sing (d) it is magnetic
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) the same string (c) number of pulleys (d) the lifting height
14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) string (c) turmeric powder (d) a battery cell
15. 15.⚙️ Which of these uses a pulley? (a) a tap handle (b) a spoon lifting a lid (c) a crane (d) a doorknob
16. 16.True or false: a slide is a lever. (a) False (b) True
17. 17.⚙️ Which of these is a lever? (a) a sloping road (b) a tap handle (c) a flagpole (d) a see-saw
18. 18.⚖️ 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 keep it the same (c) we measure it
19. 19.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
20. 20.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
21. 21.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) impossible (d) harder
22. 22.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) nail (c) battery (d) magnet
23. 23.⚙️ Which of these is a lever? (a) a flagpole (b) a bottle opener (c) a slide (d) a ramp
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a battery cell (c) yeast (d) turmeric powder
25. 25.⚖️ 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) True (b) False
26. 26.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 20 cm (d) 40 cm
27. 27.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) about half (d) zero
28. 28.True or false: a doorknob is an inclined plane. (a) False (b) True
29. 29.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
30. 30.⚖️ 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
31. 31.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
32. 32.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) in a circle (d) down
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a magnet (c) a small paper cup (d) turmeric powder
34. 34.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) a pencil (c) string (d) a small paper cup
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) a battery cell (d) a pencil
37. 37.True or false: a see-saw uses a pulley. (a) True (b) False
38. 38.True or false: a sloping road is an inclined plane. (a) True (b) False
39. 39.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a spoon lifting a lid (c) a slide (d) a steering wheel
40. 40.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed

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