Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 906 · 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? Which of these is kept the same? (a) which side goes down (b) distance from the pencil (c) where the pencil is
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a magnet (d) a round pencil
3. 3.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
4. 4.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) harder (d) easier
5. 5.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a sloping road (c) a tap handle (d) a well pulley
6. 6.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
7. 7.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the lid gets softer (c) the spoon is hot (d) the spoon is magnetic
8. 8.True or false: yeast is needed for the ruler lever. (a) False (b) True
9. 9.⚙️ Which of these is a lever? (a) a crane (b) a sloping road (c) a slide (d) a spoon lifting a lid
10. 10.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is kept the same. (a) False (b) True
11. 11.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) bend it till it snaps (c) stand on the ruler (d) press it gently
12. 12.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a magnet (c) a battery cell (d) a round pencil
13. 13.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a magnet (c) a battery cell (d) a balloon
14. 14.⚖️ 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 measure it (b) we keep it the same (c) we change it
15. 15.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) yeast (d) coins of one kind
16. 16.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a flagpole (c) a spoon lifting a lid (d) a doorknob
17. 17.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is the one thing we change? (a) the number of coins (b) the kind of coins (c) distance from the pencil (d) the same ruler
18. 18.⚖️ 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 change it (c) we keep it the same
19. 19.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
20. 20.⚙️ Which simple machine is a well pulley? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
21. 21.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
22. 22.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) yeast (c) turmeric powder (d) a flat table
23. 23.⚙️ Which of these is a lever? (a) a sloping road (b) a slide (c) a ramp (d) a see-saw
24. 24.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the axle (d) the fulcrum
25. 25.True or false: a crowbar is an inclined plane. (a) True (b) False
26. 26.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit farther from middle (c) sit on the middle (d) sit closer to middle
27. 27.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are magnetic (c) they are too cold (d) they may swallow them
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 4 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
29. 29.⚙️ Which of these is a lever? (a) a bottle opener (b) a sloping road (c) a ramp (d) a doorknob
30. 30.True or false: a crane is an inclined plane. (a) True (b) False
31. 31.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
32. 32.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 12 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
33. 33.⚖️ 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 measure it (b) we keep it the same (c) we change it
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) coins of one kind (d) a battery cell
35. 35.⚙️ Which of these uses a pulley? (a) a sloping road (b) a doorknob (c) a crane (d) a steering wheel
36. 36.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is the one thing we change. (a) True (b) False
37. 37.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a flat table (c) a round pencil (d) a magnet
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
39. 39.⚙️ Which simple machine is a doorknob? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
40. 40.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) a 30 cm ruler (c) coins of one kind (d) a flat table

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