Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 129 · 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.⚖️ 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
2. 2.⚖️ 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) True (b) False
3. 3.🧺 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
4. 4.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
5. 5.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
6. 6.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a small paper cup (c) string (d) turmeric powder
8. 8.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) sideways (c) down (d) up
9. 9.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
10. 10.⚙️ Which of these is a lever? (a) a well pulley (b) a tap handle (c) a see-saw (d) a sloping road
11. 11.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
12. 12.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it gets longer (d) it can hurt your finger
13. 13.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) the same (d) double
14. 14.True or false: a crowbar is a lever. (a) False (b) True
15. 15.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 20 cm (d) 40 cm
16. 16.⚙️ Which of these uses a pulley? (a) a slide (b) a sloping road (c) a crane (d) a see-saw
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) the lifting height (c) the same cup of coins (d) how hard we must pull
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) yeast (c) a mirror (d) a pencil
20. 20.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
21. 21.⚙️ Which simple machine is a slide? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
22. 22.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the blackboard (c) on the bench (d) on the flagpole
23. 23.⚖️ 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) True (b) False
24. 24.🧺 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 balloon (d) an empty thread reel
25. 25.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
26. 26.⚖️ 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 same string (c) the lifting height (d) number of pulleys
27. 27.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) magnet (d) nail
28. 28.⚖️ 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
29. 29.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
31. 31.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) easier (d) the same
32. 32.⚖️ 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
33. 33.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
34. 34.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
35. 35.⚙️ Which of these uses a pulley? (a) a slide (b) a see-saw (c) a flagpole (d) a crowbar
36. 36.True or false: a tap handle uses a pulley. (a) True (b) False
37. 37.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
38. 38.⚖️ 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
39. 39.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
40. 40.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids