Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 123 · 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 simple machine is a sloping road? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
2. 2.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) jump up and down (c) sit on the middle (d) sit closer to middle
3. 3.⚖️ 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) where the pencil is (b) the same ruler (c) the number of coins (d) distance from the pencil
4. 4.⚖️ 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 change it (b) we keep it the same (c) we measure it
5. 5.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 2 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?
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 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?
7. 7.True or false: a crowbar is a lever. (a) True (b) False
8. 8.True or false: a sloping road is an inclined plane. (a) True (b) False
9. 9.🔮 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) the left side (c) both go up (d) the right side
10. 10.⚖️ 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?
11. 11.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
12. 12.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
13. 13.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
14. 14.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) harder (d) the same
15. 15.⚖️ 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
16. 16.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a sloping road (c) a see-saw (d) a tap handle
17. 17.⚖️ 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) the kind of coins (c) which side goes down
18. 18.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
19. 19.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a 30 cm ruler (d) a mirror
20. 20.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
21. 21.⚙️ Which of these is a lever? (a) a ramp (b) a spoon lifting a lid (c) a doorknob (d) a well pulley
22. 22.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
23. 23.⚙️ Which simple machine is a slide? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
24. 24.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 5 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?
26. 26.True or false: a see-saw is a lever. (a) False (b) True
27. 27.⚖️ What is the turning point of a lever called? (a) the load (b) the axle (c) the effort (d) the fulcrum
28. 28.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they may swallow them (c) they are magnetic (d) they are too cold
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) yeast (d) coins of one kind
30. 30.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
31. 31.True or false: a slide is an inclined plane. (a) False (b) True
32. 32.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
33. 33.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a balloon (c) a magnet (d) a round pencil
34. 34.True or false: a flat table is needed for the ruler lever. (a) False (b) True
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) which side goes down (c) the same ruler (d) distance from the pencil
36. 36.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
37. 37.⚖️ 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) False (b) True
38. 38.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
39. 39.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
40. 40.⚙️ Which of these is an inclined plane? (a) a slide (b) a spoon lifting a lid (c) a well pulley (d) a steering wheel

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