Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 201 · 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.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
2. 2.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
3. 3.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are too shiny (c) they may swallow them (d) they are magnetic
4. 4.⚖️ 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
5. 5.⚖️ 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) False (b) True
6. 6.⚖️ 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 keep it the same (b) we measure it (c) we change it
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 12 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?
8. 8.⚙️ Which simple machine is a ramp? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
9. 9.⚖️ 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 same ruler
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) a magnet
11. 11.True or false: a doorknob is a lever. (a) False (b) True
12. 12.True or false: a steering wheel is a lever. (a) False (b) True
13. 13.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) impossible (c) the same (d) harder
14. 14.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) flick coins at faces (c) press it gently (d) stand on the ruler
15. 15.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) a round pencil (c) coins of one kind (d) a 30 cm ruler
16. 16.⚙️ Which of these is a lever? (a) a ramp (b) a crowbar (c) a steering wheel (d) a slide
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) yeast (d) a round pencil
18. 18.⚖️ 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
19. 19.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 8 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
20. 20.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the kind of coins (b) distance from the pencil (c) which side goes down
21. 21.True or false: a magnet is needed for the ruler lever. (a) False (b) True
22. 22.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a mirror (d) a 30 cm ruler
23. 23.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the spoon is magnetic (c) the lid gets softer (d) a lever boosts your push
24. 24.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
25. 25.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
26. 26.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is the one thing we change. (a) False (b) True
27. 27.⚙️ Which of these is a lever? (a) a steering wheel (b) a well pulley (c) a ramp (d) a see-saw
28. 28.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
29. 29.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
30. 30.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a flat table (c) yeast (d) a battery cell
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 3 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
32. 32.⚖️ 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) True (b) False
33. 33.⚖️ 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) where the pencil is (b) distance from the pencil (c) the number of coins (d) the kind of coins
34. 34.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a doorknob (c) a bottle opener (d) a slide
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
36. 36.🔮 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
37. 37.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
38. 38.True or false: a slide is an inclined plane. (a) False (b) True
39. 39.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a spoon lifting a lid (c) a doorknob (d) a ramp
40. 40.True or false: a flat table is needed for the ruler lever. (a) True (b) False

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