Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 792 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a battery cell (c) a pencil (d) string
2. 2.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it gets hot (d) it could fall on you
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) string (c) coins as the load (d) a small paper cup
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
5. 5.True or false: a slide is an inclined plane. (a) True (b) False
6. 6.⚖️ 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
7. 7.⚖️ 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) the same cup of coins (c) number of pulleys (d) the lifting height
8. 8.⚖️ 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
9. 9.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) down (c) up (d) sideways
10. 10.🔮 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
11. 11.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) coins as the load (d) a balloon
13. 13.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
14. 14.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
15. 15.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a balloon (c) a battery cell (d) an empty thread reel
17. 17.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a doorknob (c) a see-saw (d) a ramp
18. 18.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a magnet (c) a pencil (d) a small paper cup
20. 20.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a tap handle (c) a sloping road (d) a flagpole
21. 21.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it gets wet (d) it can hurt your finger
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) yeast (d) string
23. 23.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) turmeric powder (d) a pencil
25. 25.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a ramp (c) a well pulley (d) a tap handle
26. 26.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) zero (d) about half
27. 27.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
28. 28.True or false: a well pulley is a wheel and axle. (a) False (b) True
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the same cup of coins (c) the lifting height (d) how hard we must pull
30. 30.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
31. 31.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
33. 33.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
34. 34.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
35. 35.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
36. 36.⚖️ 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) how hard we must pull (c) the same cup of coins
37. 37.⚙️ Which simple machine is a tap handle? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
38. 38.True or false: a sloping road is an inclined plane. (a) False (b) True
39. 39.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
40. 40.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the flagpole (c) in the tap (d) on the bench

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