Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 730 · 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: how hard we must pull is kept the same. (a) False (b) True
2. 2.True or false: a crowbar uses a pulley. (a) False (b) True
3. 3.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it turns blue (d) it gets longer
4. 4.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
5. 5.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
6. 6.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 10 cm (d) 20 cm
7. 7.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it is magnetic (d) it could fall on you
8. 8.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) zero (d) the same
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we measure it (c) we keep it the same
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull
11. 11.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a ramp (c) a crowbar (d) a doorknob
12. 12.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
13. 13.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
14. 14.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a flagpole (c) a ramp (d) a bottle opener
15. 15.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a slide (c) a ramp (d) a crane
16. 16.⚙️ Which simple machine is a see-saw? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
17. 17.True or false: a steering wheel is a wheel and axle. (a) True (b) False
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 keep it the same (b) we change it (c) we measure it
19. 19.⚖️ 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
20. 20.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) an empty thread reel (d) a mirror
22. 22.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
23. 23.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) in a circle (d) down
24. 24.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) changes pull direction (d) halves the weight
25. 25.⚙️ Which of these is a lever? (a) a see-saw (b) a steering wheel (c) a slide (d) a well pulley
26. 26.⚖️ 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
27. 27.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
28. 28.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
29. 29.True or false: a sloping road uses a pulley. (a) True (b) False
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a battery cell (d) a small paper cup
31. 31.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
32. 32.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
33. 33.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
34. 34.⚙️ Which simple machine is a well pulley? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
35. 35.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a steering wheel (c) a see-saw (d) a ramp
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we change it (c) we measure it
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) string (d) yeast
38. 38.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
39. 39.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
40. 40.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) nail (c) battery (d) rope

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