Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 446 · 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.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) a small paper cup (c) a pencil (d) coins as the load
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a magnet (c) a pencil (d) string
4. 4.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) False (b) True
6. 6.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) adds weight (d) halves the weight
7. 7.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) magnet (c) rope (d) battery
8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) coins as the load (c) a balloon (d) an empty thread reel
9. 9.⚖️ 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
10. 10.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
11. 11.True or false: a tap handle is an inclined plane. (a) False (b) True
12. 12.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it might sing (d) it gets hot
13. 13.True or false: a crowbar is an inclined plane. (a) False (b) True
14. 14.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
15. 15.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it can hurt your finger (d) it turns blue
16. 16.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
17. 17.True or false: a sloping road is a lever. (a) False (b) True
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we measure it (c) we keep it the same
19. 19.⚖️ 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) the lifting height (c) how hard we must pull (d) number of pulleys
20. 20.⚖️ 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) False (b) True
21. 21.⚖️ 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
22. 22.⚙️ Which of these is a lever? (a) a slide (b) a steering wheel (c) a spoon lifting a lid (d) a doorknob
23. 23.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) down (c) sideways (d) in a circle
24. 24.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) yeast (c) a small paper cup (d) string
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) yeast (d) an empty thread reel
27. 27.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a ramp (c) a crane (d) a crowbar
28. 28.True or false: a slide is a lever. (a) False (b) True
29. 29.True or false: a doorknob is a lever. (a) True (b) False
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same string (b) how hard we must pull (c) the lifting height (d) number of pulleys
31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) a small paper cup (c) coins as the load (d) an empty thread reel
32. 32.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
33. 33.True or false: string is needed for the thread-reel pulley. (a) False (b) True
34. 34.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
35. 35.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a battery cell (c) a pencil (d) a balloon
37. 37.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a balloon (c) coins as the load (d) string
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.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 20 cm (d) 10 cm

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