Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 632 · 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.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit farther from middle (c) sit on the middle (d) jump up and down
2. 2.⚖️ 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) True (b) False
3. 3.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) press it gently (c) stand on the ruler (d) bend it till it snaps
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a balloon (d) a 30 cm ruler
5. 5.⚙️ Which of these is a lever? (a) a flagpole (b) a bottle opener (c) a ramp (d) a tap handle
6. 6.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a magnet (c) a mirror (d) a battery cell
7. 7.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) False (b) True
8. 8.🧺 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) yeast (d) a round pencil
9. 9.True or false: a slide is a wheel and axle. (a) False (b) True
10. 10.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
11. 11.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) True (b) False
12. 12.⚖️ 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 measure it (b) we change it (c) we keep it the same
13. 13.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) harder (d) impossible
14. 14.⚙️ Which of these uses a pulley? (a) a tap handle (b) a doorknob (c) a crowbar (d) a crane
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
16. 16.⚙️ Which simple machine is a see-saw? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
17. 17.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
18. 18.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
19. 19.🔮 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 left side (b) the right side (c) both go up (d) neither, it balances
20. 20.⚖️ 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) True (b) False
21. 21.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) True (b) False
22. 22.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) which side goes down (c) where the pencil is
23. 23.True or false: a bottle opener is a wheel and axle. (a) True (b) False
24. 24.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a well pulley (c) a ramp (d) a crowbar
25. 25.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
26. 26.⚖️ 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?
27. 27.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
28. 28.True or false: a see-saw is an inclined plane. (a) True (b) False
29. 29.⚖️ 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 change it (b) we measure it (c) we keep it the same
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
31. 31.⚖️ 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?
32. 32.⚙️ Which of these uses a pulley? (a) a flagpole (b) a see-saw (c) a crowbar (d) a spoon lifting a lid
33. 33.⚙️ Which of these is a lever? (a) a slide (b) a flagpole (c) a see-saw (d) a doorknob
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a round pencil (c) a 30 cm ruler (d) a flat table
35. 35.⚖️ 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 kind of coins
36. 36.⚖️ 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 change it (c) we keep it the same
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 4 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
38. 38.⚖️ 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) False (b) True
39. 39.⚖️ 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
40. 40.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a mirror (c) coins of one kind (d) a balloon

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