Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 139 · 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.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
2. 2.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) adds weight (d) makes it magnetic
3. 3.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
4. 4.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
5. 5.⚙️ Which simple machine is a sloping road? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
6. 6.🏗️ 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
7. 7.True or false: a ramp is a lever. (a) False (b) True
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) coins as the load (d) yeast
9. 9.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) zero (d) about half
10. 10.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) easier (d) the same
11. 11.True or false: a slide is an inclined plane. (a) False (b) True
12. 12.⚖️ 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) number of pulleys (c) the lifting height (d) the same cup of coins
13. 13.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) a pencil (d) a mirror
15. 15.⚖️ 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 measure it (b) we keep it the same (c) we change it
16. 16.⚙️ Which simple machine is a crane? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
17. 17.⚖️ 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
18. 18.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) down (c) sideways (d) up
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same string (b) number of pulleys (c) how hard we must pull
20. 20.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
21. 21.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
22. 22.⚖️ 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 change it (c) we keep it the same
23. 23.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a flagpole (c) a tap handle (d) a ramp
24. 24.🛟 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
25. 25.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it gets hot (d) it might sing
26. 26.🧺 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) a pencil (d) a balloon
27. 27.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) rope (c) battery (d) magnet
28. 28.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a battery cell (c) a mirror (d) a small paper cup
30. 30.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
31. 31.🧺 Do we need string 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: how hard we must pull is the one thing we change. (a) True (b) False
33. 33.⚖️ 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) the lifting height (d) number of pulleys
34. 34.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a balloon (c) coins as the load (d) yeast
36. 36.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a sloping road (c) a crane (d) a doorknob
37. 37.⚖️ 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
38. 38.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a crowbar (c) a bottle opener (d) a crane
39. 39.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
40. 40.⚖️ 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

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