Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 677 · 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.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) False (b) True
3. 3.🛟 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
4. 4.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
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 measure it (c) we change it
6. 6.⚙️ Which of these uses a pulley? (a) a crowbar (b) a tap handle (c) a well pulley (d) a doorknob
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) the same cup of coins (c) number of pulleys
8. 8.⚙️ Which of these is a lever? (a) a slide (b) a bottle opener (c) a flagpole (d) a well pulley
9. 9.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it is magnetic (d) it could fall on you
10. 10.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a magnet (c) a mirror (d) turmeric powder
12. 12.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) down (d) sideways
13. 13.🏗️ 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
14. 14.⚖️ 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 keep it the same (b) we change it (c) we measure it
15. 15.⚙️ Which of these is an inclined plane? (a) a slide (b) a crane (c) a see-saw (d) a flagpole
16. 16.⚖️ 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
17. 17.⚙️ Which of these uses a pulley? (a) a crane (b) a bottle opener (c) a see-saw (d) a spoon lifting a lid
18. 18.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
19. 19.⚙️ Which of these is a lever? (a) a crowbar (b) a well pulley (c) a tap handle (d) a steering wheel
20. 20.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a ramp (c) a tap handle (d) a doorknob
21. 21.True or false: a crowbar is an inclined plane. (a) True (b) False
22. 22.True or false: a slide is an inclined plane. (a) True (b) False
23. 23.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
24. 24.⚙️ Which simple machine is a see-saw? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a battery cell (c) turmeric powder (d) a balloon
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a battery cell (c) an empty thread reel (d) coins as the load
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) yeast (c) an empty thread reel (d) a battery cell
28. 28.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
29. 29.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) yeast (d) an empty thread reel
31. 31.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) True (b) False
33. 33.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
34. 34.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) the same (d) double
35. 35.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
36. 36.⚖️ 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
37. 37.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) nail (c) battery (d) rope
38. 38.⚖️ 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
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) turmeric powder (c) a small paper cup (d) an empty thread reel
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False

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