Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 275 · 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.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a crowbar (c) a flagpole (d) a see-saw
2. 2.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) False (b) True
3. 3.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) bend it till it snaps (c) stand on the ruler (d) press it gently
4. 4.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) always 10 (c) zero (d) bigger on the left
5. 5.🔮 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
6. 6.⚖️ 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?
7. 7.⚖️ 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
8. 8.⚙️ Which of these is a wheel and axle? (a) a slide (b) a doorknob (c) a well pulley (d) a sloping road
9. 9.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) turmeric powder (c) coins of one kind (d) a flat table
10. 10.⚖️ 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) where the pencil is (c) distance from the pencil (d) which side goes down
11. 11.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
12. 12.⚙️ Which of these is a lever? (a) a tap handle (b) a doorknob (c) a see-saw (d) a sloping road
13. 13.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are too shiny (c) they are magnetic (d) they may swallow them
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 12 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
15. 15.⚖️ 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?
16. 16.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) coins of one kind (d) yeast
17. 17.⚙️ Which of these is a lever? (a) a flagpole (b) a doorknob (c) a tap handle (d) a bottle opener
18. 18.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a doorknob (c) a bottle opener (d) a well pulley
19. 19.🧺 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 battery cell (d) coins of one kind
20. 20.True or false: a spoon lifting a lid is a lever. (a) True (b) False
21. 21.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
22. 22.⚖️ 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
23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) coins of one kind (c) a flat table (d) a 30 cm ruler
24. 24.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a magnet (c) a battery cell (d) turmeric powder
25. 25.⚖️ What is the turning point of a lever called? (a) the load (b) the fulcrum (c) the axle (d) the effort
26. 26.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) True (b) False
27. 27.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) a magnet (c) a battery cell (d) yeast
28. 28.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
29. 29.True or false: a flat table is needed for the ruler lever. (a) False (b) True
30. 30.⚙️ Which of these is a lever? (a) a crane (b) a steering wheel (c) a slide (d) a spoon lifting a lid
31. 31.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a sloping road (c) a doorknob (d) a bottle opener
32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) True (b) False
33. 33.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit farther from middle (c) jump up and down (d) sit on the middle
34. 34.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a round pencil (c) a 30 cm ruler (d) a flat table
35. 35.⚖️ 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 kind of coins (b) the same ruler (c) which side goes down (d) distance from the pencil
36. 36.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
37. 37.⚖️ 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) the number of coins (c) distance from the pencil
38. 38.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
39. 39.⚖️ 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) True (b) False
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?

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