Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 774 · 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.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
2. 2.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the lid gets softer (c) a lever boosts your push (d) the spoon is magnetic
3. 3.🧺 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) a flat table (d) a battery cell
4. 4.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) stand on the ruler (c) flick coins at faces (d) press it gently
5. 5.🧺 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
6. 6.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they may swallow them (c) they are magnetic (d) they are too shiny
7. 7.True or false: a crane is a lever. (a) True (b) False
8. 8.True or false: yeast is not needed for the ruler lever. (a) True (b) False
9. 9.True or false: a flagpole uses a pulley. (a) True (b) False
10. 10.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) harder (c) the same (d) impossible
11. 11.⚖️ 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
12. 12.⚖️ 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 change it (c) we measure it
13. 13.True or false: a steering wheel is a wheel and axle. (a) True (b) False
14. 14.⚖️ 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) which side goes down (c) the same ruler (d) where the pencil is
15. 15.⚖️ 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 change it (c) we keep it the same
16. 16.🔮 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) neither, it balances (d) both go up
17. 17.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
18. 18.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) coins of one kind (c) a 30 cm ruler (d) a round pencil
19. 19.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 2 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
20. 20.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a tap handle (c) a spoon lifting a lid (d) a crane
21. 21.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
22. 22.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
23. 23.⚖️ 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
24. 24.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a steering wheel (c) a bottle opener (d) a ramp
25. 25.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
26. 26.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
27. 27.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) bigger on the left (c) zero (d) equal on both sides
28. 28.True or false: a spoon lifting a lid is a lever. (a) False (b) True
29. 29.True or false: a mirror is needed for the ruler lever. (a) True (b) False
30. 30.⚖️ 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
31. 31.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) yeast (c) a flat table (d) a 30 cm ruler
32. 32.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a ramp (c) a tap handle (d) a doorknob
33. 33.🧺 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 flat table (d) a mirror
34. 34.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a mirror (c) a flat table (d) yeast
35. 35.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 4 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?
37. 37.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
38. 38.⚖️ 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 change it (c) we measure it
39. 39.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a 30 cm ruler (c) a balloon (d) yeast
40. 40.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True

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