Lever Experiment Worksheet

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

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