Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 948 · 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 is a lever? (a) a ramp (b) a spoon lifting a lid (c) a sloping road (d) a tap handle
2. 2.True or false: a tap handle is a wheel and axle. (a) True (b) False
3. 3.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
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 same ruler (b) where the pencil is (c) the kind of coins (d) distance from the pencil
5. 5.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
6. 6.⚙️ Which of these is a lever? (a) a slide (b) a ramp (c) a doorknob (d) a bottle opener
7. 7.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) impossible (d) easier
8. 8.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 2 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
9. 9.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) a battery cell (c) a magnet (d) a mirror
10. 10.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
11. 11.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a ramp (c) a flagpole (d) a see-saw
12. 12.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) bend it till it snaps (d) press it gently
13. 13.True or false: a crowbar uses a pulley. (a) True (b) False
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 8 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?
15. 15.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) a battery cell (d) a flat table
16. 16.⚖️ 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 measure it (b) we change it (c) we keep it the same
17. 17.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) both go up (c) the left side (d) the right side
18. 18.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 8 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
19. 19.⚖️ 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
20. 20.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a flat table (d) turmeric powder
21. 21.⚙️ Which of these uses a pulley? (a) a ramp (b) a steering wheel (c) a tap handle (d) a flagpole
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 4 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
23. 23.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) True (b) False
24. 24.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) where the pencil is (b) which side goes down (c) the number of coins (d) distance from the pencil
25. 25.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a flat table (c) a 30 cm ruler (d) a round pencil
27. 27.True or false: a bottle opener uses a pulley. (a) True (b) False
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
29. 29.True or false: a flat table is needed for the ruler lever. (a) False (b) True
30. 30.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
31. 31.⚖️ 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 measure it (b) we change it (c) we keep it the same
32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) True (b) False
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 6 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
34. 34.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
35. 35.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a magnet (c) coins of one kind (d) a 30 cm ruler
36. 36.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
37. 37.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
38. 38.True or false: a spoon lifting a lid is a lever. (a) True (b) False
39. 39.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?

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