Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 170 · 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.🧺 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) a battery cell (d) an empty thread reel
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the lifting height (b) number of pulleys (c) how hard we must pull
3. 3.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) nail (c) rope (d) battery
4. 4.⚖️ 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
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) False (b) True
6. 6.⚖️ 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
7. 7.⚖️ 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
8. 8.True or false: a see-saw is a lever. (a) False (b) True
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) a mirror (d) string
10. 10.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
11. 11.🧺 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) yeast (d) an empty thread reel
12. 12.⚙️ Which of these is a lever? (a) a crowbar (b) a steering wheel (c) a flagpole (d) a slide
13. 13.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
14. 14.True or false: a bottle opener is a lever. (a) False (b) True
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a mirror (c) a small paper cup (d) a magnet
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a battery cell (c) string (d) yeast
17. 17.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it could fall on you (d) it is magnetic
18. 18.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) zero (d) the same
19. 19.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
20. 20.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a well pulley (c) a crowbar (d) a spoon lifting a lid
21. 21.⚖️ 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 change it (b) we keep it the same (c) we measure it
22. 22.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
23. 23.True or false: a spoon lifting a lid is an inclined plane. (a) True (b) False
24. 24.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) down (c) up (d) sideways
25. 25.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) the same (d) easier
26. 26.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a see-saw (c) a bottle opener (d) a slide
27. 27.⚖️ 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
28. 28.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
29. 29.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 10 cm (d) 5 cm
30. 30.True or false: a steering wheel is a wheel and axle. (a) True (b) False
31. 31.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) adds weight (d) makes it magnetic
32. 32.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a well pulley (c) a spoon lifting a lid (d) a crane
33. 33.⚖️ 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) how hard we must pull (d) the same cup of coins
34. 34.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
35. 35.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a flagpole (c) a crowbar (d) a doorknob
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a balloon (c) turmeric powder (d) a mirror
37. 37.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
38. 38.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
39. 39.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
40. 40.⚖️ 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

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