Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 871 · 40 questions

What you do (Coins × distance): 1. Balance the ruler on the pencil at its 15 cm mark. 2. Put coins at a measured distance on the left side. 3. Place coins on the right and slide them until the ruler balances. 4. Check: coins × distance on the left = coins × distance on the right; press gently.

1. 1.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
2. 2.True or false: a tap handle is a wheel and axle. (a) False (b) True
3. 3.True or false: a crowbar is a wheel and axle. (a) False (b) True
4. 4.True or false: a steering wheel is a wheel and axle. (a) True (b) False
5. 5.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) coins of one kind (d) a magnet
6. 6.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is hot (c) the spoon is magnetic (d) a lever boosts your push
7. 7.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) press it gently (d) bend it till it snaps
8. 8.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
9. 9.True or false: a crowbar is a lever. (a) True (b) False
10. 10.True or false: a bottle opener is a wheel and axle. (a) False (b) True
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
12. 12.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) bigger on the left (c) equal on both sides (d) zero
13. 13.True or false: a crane uses a pulley. (a) False (b) True
14. 14.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the kind of coins (b) distance from the pencil (c) the same ruler (d) which side goes down
15. 15.True or false: a doorknob is a wheel and axle. (a) True (b) False
16. 16.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a balloon (c) a mirror (d) a magnet
17. 17.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
18. 18.True or false: a see-saw is a wheel and axle. (a) True (b) False
19. 19.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
20. 20.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
21. 21.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) True (b) False
22. 22.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) yeast (d) a round pencil
24. 24.True or false: a magnet is needed for the ruler lever. (a) False (b) True
25. 25.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) True (b) False
26. 26.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) True (b) False
27. 27.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
28. 28.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the same ruler”? (a) we keep it the same (b) we measure it (c) we change it
29. 29.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) the same (d) harder
30. 30.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
31. 31.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is the one thing we change. (a) True (b) False
33. 33.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) a flat table (c) a round pencil (d) a 30 cm ruler
34. 34.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the same ruler (b) distance from the pencil (c) which side goes down
35. 35.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
36. 36.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “distance from the pencil”? (a) we keep it the same (b) we measure it (c) we change it
37. 37.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “where the pencil is”? (a) we change it (b) we measure it (c) we keep it the same
38. 38.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a well pulley (c) a steering wheel (d) a bottle opener
39. 39.True or false: a spoon lifting a lid is an inclined plane. (a) True (b) False
40. 40.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed

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