Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 313 · 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.⚖️ 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) where the pencil is (c) which side goes down
2. 2.⚖️ 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 measure it (c) we keep it the same
3. 3.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
4. 4.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
5. 5.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a doorknob (c) a ramp (d) a tap handle
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 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?
7. 7.True or false: a see-saw is a lever. (a) False (b) True
8. 8.⚖️ 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?
9. 9.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit on the middle (c) sit closer to middle (d) sit farther from middle
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a round pencil (c) coins of one kind (d) a 30 cm ruler
11. 11.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
12. 12.True or false: a sloping road uses a pulley. (a) True (b) False
13. 13.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
14. 14.True or false: a flagpole is a lever. (a) True (b) False
15. 15.⚙️ Which simple machine is a flagpole? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
16. 16.⚖️ What is the turning point of a lever called? (a) the load (b) the effort (c) the fulcrum (d) the axle
17. 17.True or false: a spoon lifting a lid is a wheel and axle. (a) True (b) False
18. 18.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a battery cell (c) a magnet (d) a flat table
19. 19.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too cold (d) they are too shiny
20. 20.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) a balloon
21. 21.⚖️ 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 same ruler (b) distance from the pencil (c) the number of coins (d) which side goes down
22. 22.🔮 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) neither, it balances (c) the right side (d) both go up
23. 23.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) easier (d) the same
24. 24.True or false: a slide is an inclined plane. (a) True (b) False
25. 25.⚖️ 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 measure it (b) we change it (c) we keep it the same
26. 26.True or false: a well pulley is an inclined plane. (a) True (b) False
27. 27.⚖️ 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 change it (b) we measure it (c) we keep it the same
28. 28.⚖️ 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
29. 29.True or false: yeast is needed for the ruler lever. (a) False (b) True
30. 30.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
31. 31.⚖️ 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?
32. 32.True or false: a tap handle is a lever. (a) False (b) True
33. 33.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a round pencil (d) a mirror
34. 34.⚙️ Which simple machine is a ramp? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
35. 35.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) False (b) True
36. 36.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a steering wheel (c) a slide (d) a flagpole
37. 37.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) flick coins at faces (c) bend it till it snaps (d) press it gently
38. 38.True or false: a see-saw uses a pulley. (a) True (b) False
39. 39.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
40. 40.⚖️ 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 number of coins

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