Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 654 · 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.🧺 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 battery cell (d) coins of one kind
2. 2.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
3. 3.⚖️ 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
4. 4.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
5. 5.True or false: a balloon is needed for the ruler lever. (a) False (b) True
6. 6.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a bottle opener (c) a spoon lifting a lid (d) a doorknob
7. 7.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
8. 8.True or false: a steering wheel uses a pulley. (a) False (b) True
9. 9.⚙️ Which of these uses a pulley? (a) a slide (b) a flagpole (c) a ramp (d) a crowbar
10. 10.⚖️ 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
11. 11.⚖️ 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
12. 12.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 8 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
13. 13.True or false: a see-saw is an inclined plane. (a) False (b) True
14. 14.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) the same (d) easier
15. 15.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
16. 16.True or false: a steering wheel is a lever. (a) False (b) True
17. 17.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
18. 18.True or false: a tap handle is a wheel and axle. (a) True (b) False
19. 19.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) a lever boosts your push (c) the spoon is magnetic (d) the lid gets softer
20. 20.True or false: a slide is an inclined plane. (a) False (b) True
21. 21.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) yeast (c) coins of one kind (d) a flat table
22. 22.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
23. 23.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
24. 24.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a mirror (c) a balloon (d) coins of one kind
25. 25.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) press it gently (c) bend it till it snaps (d) flick coins at faces
26. 26.⚖️ 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 same ruler (b) the kind of coins (c) distance from the pencil (d) which side goes down
27. 27.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a flat table (c) turmeric powder (d) a battery cell
28. 28.True or false: a slide is a lever. (a) False (b) True
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a magnet (c) a round pencil (d) coins of one kind
30. 30.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) where the pencil is (b) which side goes down (c) distance from the pencil
31. 31.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) yeast (c) a round pencil (d) a flat table
32. 32.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
33. 33.⚙️ Which of these is an inclined plane? (a) a ramp (b) a doorknob (c) a tap handle (d) a flagpole
34. 34.True or false: a flagpole is a lever. (a) True (b) False
35. 35.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) a round pencil (c) coins of one kind (d) a 30 cm ruler
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) a round pencil (c) a flat table (d) a 30 cm ruler
37. 37.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
38. 38.⚖️ 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) True (b) False
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 12 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
40. 40.🔮 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) neither, it balances (d) the right side

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