Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 716 · 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? True or false: where the pencil is is the one thing we change. (a) False (b) True
2. 2.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (a) False (b) True
3. 3.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) easier (c) the same (d) impossible
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
5. 5.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
6. 6.⚙️ Which of these uses a pulley? (a) a flagpole (b) a crowbar (c) a ramp (d) a steering wheel
7. 7.🛟 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
8. 8.⚖️ 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) the number of coins
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) turmeric powder (c) a round pencil (d) coins of one kind
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) a flat table (c) a 30 cm ruler (d) coins of one kind
11. 11.⚖️ 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
12. 12.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they may swallow them (d) they are too shiny
13. 13.⚖️ 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) the same ruler (c) which side goes down (d) the kind of coins
14. 14.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a mirror (c) coins of one kind (d) a 30 cm ruler
15. 15.⚖️ 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 same ruler (c) where the pencil is (d) distance from the pencil
16. 16.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
17. 17.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
18. 18.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
19. 19.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a magnet (c) yeast (d) coins of one kind
20. 20.🔮 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) neither, it balances (c) the right side (d) the left side
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 the one thing we change. (a) True (b) False
22. 22.True or false: a see-saw is a wheel and axle. (a) False (b) True
23. 23.⚙️ Which of these is a lever? (a) a steering wheel (b) a flagpole (c) a crowbar (d) a well pulley
24. 24.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a tap handle (c) a crane (d) a sloping road
25. 25.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a magnet (d) coins of one kind
26. 26.True or false: turmeric powder is not needed for the ruler lever. (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: distance from the pencil is the one thing we change. (a) False (b) True
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 2 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?
29. 29.⚙️ Which of these is a lever? (a) a flagpole (b) a ramp (c) a slide (d) a see-saw
30. 30.True or false: a tap handle is a lever. (a) True (b) False
31. 31.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) turmeric powder (d) a flat table
32. 32.⚙️ Which of these is a lever? (a) a steering wheel (b) a well pulley (c) a slide (d) a bottle opener
33. 33.⚖️ 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
34. 34.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
35. 35.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) True (b) False
36. 36.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
37. 37.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit closer to middle (c) jump up and down (d) sit on the middle
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 1 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
39. 39.True or false: a balloon is needed for the ruler lever. (a) True (b) False
40. 40.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle

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