Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 158 · 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.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it is magnetic (d) it gets hot
2. 2.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
3. 3.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the flagpole (c) in the tap (d) on the bench
4. 4.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) adds weight (d) halves the weight
5. 5.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
6. 6.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
7. 7.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
8. 8.⚙️ Which of these is an inclined plane? (a) a ramp (b) a crane (c) a see-saw (d) a spoon lifting a lid
9. 9.⚖️ 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
10. 10.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) a small paper cup (c) a pencil (d) an empty thread reel
12. 12.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) down (d) in a circle
13. 13.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
14. 14.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a doorknob (c) a ramp (d) a well pulley
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) an empty thread reel (c) a pencil (d) string
16. 16.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 40 cm (d) 10 cm
17. 17.⚖️ 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) how hard we must pull (c) the lifting height (d) number of pulleys
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
19. 19.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
20. 20.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we change it (c) we keep it the same
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) False (b) True
23. 23.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
24. 24.True or false: a steering wheel is a wheel and axle. (a) True (b) False
25. 25.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) battery (c) nail (d) magnet
26. 26.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
27. 27.⚖️ 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
28. 28.⚖️ 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 measure it (c) we change it
29. 29.⚖️ 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
30. 30.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
31. 31.⚖️ 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
32. 32.True or false: a ramp is an inclined plane. (a) False (b) True
33. 33.True or false: a crowbar is a lever. (a) False (b) True
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the lifting height
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) coins as the load (c) a pencil (d) a small paper cup
36. 36.🧺 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 mirror (d) string
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) a mirror (d) a pencil
38. 38.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
39. 39.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
40. 40.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever

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