Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 777 · 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.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “which side goes down”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the load (d) the effort
3. 3.⚙️ Which of these is a lever? (a) a flagpole (b) a slide (c) a bottle opener (d) a crane
4. 4.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a battery cell (c) a flat table (d) yeast
5. 5.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the spoon is hot (c) a lever boosts your push (d) the lid gets softer
6. 6.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
7. 7.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
8. 8.🛟 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
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) turmeric powder (d) a flat table
10. 10.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 5 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
11. 11.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
12. 12.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
13. 13.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
14. 14.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) distance from the pencil (c) the number of coins
16. 16.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the kind of coins”? (a) we change it (b) we measure it (c) we keep it the same
17. 17.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
18. 18.⚙️ Which of these is a wheel and axle? (a) a slide (b) a tap handle (c) a crowbar (d) a sloping road
19. 19.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) a mirror (d) coins of one kind
20. 20.True or false: a slide is an inclined plane. (a) False (b) True
21. 21.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
22. 22.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) False (b) True
23. 23.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
24. 24.True or false: a steering wheel is a wheel and axle. (a) True (b) False
25. 25.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they are too shiny (d) they may swallow them
26. 26.True or false: a flagpole is an inclined plane. (a) False (b) True
27. 27.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
28. 28.True or false: a magnet is needed for the ruler lever. (a) True (b) False
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a battery cell (d) a 30 cm ruler
30. 30.⚙️ Which simple machine is a crane? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
31. 31.True or false: a spoon lifting a lid is a lever. (a) False (b) True
32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the number of coins”? (a) we measure it (b) we keep it the same (c) we change it
33. 33.⚖️ 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 same ruler (b) which side goes down (c) the kind of coins (d) where the pencil is
34. 34.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) the left side (c) the right side (d) neither, it balances
35. 35.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
36. 36.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) a round pencil (c) a 30 cm ruler (d) a flat table
37. 37.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
38. 38.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
39. 39.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a doorknob (c) a bottle opener (d) a ramp
40. 40.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit closer to middle (c) sit farther from middle (d) sit on the middle

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