Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 694 · 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: a ramp is an inclined plane. (a) True (b) False
2. 2.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
3. 3.⚖️ 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 change it (b) we measure it (c) we keep it the same
4. 4.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a doorknob (c) a tap handle (d) a sloping road
5. 5.⚖️ 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) the same cup of coins (c) how hard we must pull
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a mirror (c) a balloon (d) a pencil
7. 7.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
8. 8.⚖️ 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 cup of coins (b) the lifting height (c) how hard we must pull (d) number of pulleys
9. 9.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
10. 10.⚖️ 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 change it (c) we measure it
11. 11.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) rope (c) magnet (d) battery
12. 12.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) about half (d) zero
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) True (b) False
14. 14.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) in the tap (c) on the blackboard (d) on the flagpole
15. 15.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a bottle opener (c) a crowbar (d) a ramp
16. 16.⚙️ Which of these uses a pulley? (a) a flagpole (b) a sloping road (c) a bottle opener (d) a see-saw
17. 17.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) harder (d) the same
18. 18.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
19. 19.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 5 cm (c) 20 cm (d) 10 cm
20. 20.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
21. 21.True or false: a steering wheel is a wheel and axle. (a) False (b) True
22. 22.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) pulling down is easier (c) the bucket floats (d) the rope gets shorter
23. 23.⚖️ 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) True (b) False
24. 24.🛟 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
25. 25.🏗️ 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
26. 26.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
27. 27.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
28. 28.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) halves the weight (c) adds weight (d) changes pull direction
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a small paper cup (c) a magnet (d) a mirror
30. 30.True or false: a steering wheel uses a pulley. (a) False (b) True
31. 31.⚖️ 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
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) an empty thread reel (c) a battery cell (d) a magnet
33. 33.🛟 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
34. 34.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
35. 35.True or false: a see-saw is a lever. (a) True (b) False
36. 36.⚖️ 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
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) the same string (c) number of pulleys (d) how hard we must pull
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) a pencil (c) an empty thread reel (d) coins as the load
39. 39.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True

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