Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 736 · 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.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 1 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
2. 2.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
3. 3.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
4. 4.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 2 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
5. 5.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a battery cell (c) a 30 cm ruler (d) a balloon
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 5 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
7. 7.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
8. 8.⚖️ 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) distance from the pencil (b) the same ruler (c) the number of coins (d) where the pencil is
9. 9.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
10. 10.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
11. 11.⚖️ 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 keep it the same (c) we measure it
12. 12.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
13. 13.⚖️ 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 keep it the same (b) we measure it (c) we change it
14. 14.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they are magnetic (d) they may swallow them
15. 15.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) yeast (d) a 30 cm ruler
16. 16.🧺 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 30 cm ruler (d) turmeric powder
17. 17.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) a round pencil (d) a magnet
18. 18.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) a lever boosts your push (c) the spoon is hot (d) the spoon is magnetic
19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) distance from the pencil (b) which side goes down (c) the same ruler (d) the number of coins
20. 20.⚖️ 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) False (b) True
21. 21.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) True (b) False
22. 22.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) both go up (c) the right side (d) the left side
23. 23.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
24. 24.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the load (d) the effort
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 4 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
26. 26.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) press it gently (c) stand on the ruler (d) flick coins at faces
27. 27.⚖️ 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 change it (c) we measure it
28. 28.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a round pencil (c) coins of one kind (d) a 30 cm ruler
29. 29.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a round pencil (c) a 30 cm ruler (d) a battery cell
30. 30.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
31. 31.⚙️ Which of these is a wheel and axle? (a) a slide (b) a ramp (c) a see-saw (d) a doorknob
32. 32.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
33. 33.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) True (b) False
34. 34.True or false: yeast is needed for the ruler lever. (a) False (b) True
35. 35.⚙️ Which of these is a lever? (a) a crane (b) a ramp (c) a doorknob (d) a bottle opener
36. 36.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a see-saw (c) a ramp (d) a spoon lifting a lid
37. 37.⚖️ 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) False (b) True
38. 38.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
39. 39.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) impossible (d) harder
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?

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