Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 100 · 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.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
2. 2.⚙️ Which of these uses a pulley? (a) a tap handle (b) a bottle opener (c) a well pulley (d) a crowbar
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a balloon (d) a flat table
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) where the pencil is (d) distance from the pencil
5. 5.⚖️ 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 kind of coins
6. 6.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) the same (d) easier
7. 7.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the load (c) the effort (d) the axle
8. 8.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
9. 9.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a battery cell (c) a round pencil (d) a flat table
10. 10.True or false: a balloon is 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? Which of these is what we measure? (a) the number of coins (b) the kind of coins (c) the same ruler (d) which side goes down
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.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “where the pencil is”? (a) we change it (b) we keep it the same (c) we measure it
14. 14.⚖️ 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 keep it the same (c) we measure it
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 10 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
16. 16.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
17. 17.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
18. 18.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
19. 19.True or false: a slide is a lever. (a) False (b) True
20. 20.⚖️ 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
21. 21.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) yeast (d) coins of one kind
22. 22.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) equal on both sides (c) always 10 (d) bigger on the left
23. 23.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a tap handle (c) a well pulley (d) a crowbar
24. 24.⚖️ 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
25. 25.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a 30 cm ruler (c) a battery cell (d) a magnet
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 5 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
27. 27.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a flat table (d) a mirror
28. 28.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
29. 29.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
30. 30.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
31. 31.⚖️ 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 keep it the same (c) we measure it
32. 32.⚖️ 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 magnetic (c) the spoon is hot (d) the lid gets softer
33. 33.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the same ruler”? (a) we measure it (b) we keep it the same (c) we change it
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) coins of one kind (d) a magnet
35. 35.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they are too shiny (d) they may swallow them
36. 36.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a crane (c) a tap handle (d) a ramp
37. 37.True or false: a slide uses a pulley. (a) False (b) True
38. 38.True or false: a spoon lifting a lid is a lever. (a) True (b) False
39. 39.True or false: a crowbar is a wheel and axle. (a) True (b) False
40. 40.True or false: a magnet is not needed for the ruler lever. (a) False (b) True

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