Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 594 · 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 an inclined plane? (a) a see-saw (b) a flagpole (c) a tap handle (d) a slide
2. 2.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
3. 3.⚖️ 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
4. 4.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they are magnetic (d) they may swallow them
5. 5.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 6 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?
7. 7.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) coins of one kind (c) yeast (d) a mirror
8. 8.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
9. 9.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
10. 10.True or false: yeast is not needed for the ruler lever. (a) True (b) False
11. 11.⚖️ 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
12. 12.⚙️ Which simple machine is a well pulley? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
13. 13.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) impossible (d) easier
14. 14.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is kept the same. (a) False (b) True
15. 15.True or false: a crowbar is a lever. (a) False (b) True
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) yeast (c) a flat table (d) a 30 cm ruler
17. 17.True or false: yeast is needed for the ruler lever. (a) True (b) False
18. 18.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) the left side (c) the right side (d) neither, it balances
19. 19.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit farther from middle (c) sit closer to middle (d) sit on the middle
20. 20.True or false: a spoon lifting a lid is a wheel and axle. (a) False (b) True
21. 21.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) a 30 cm ruler (c) a flat table (d) a round pencil
22. 22.🧺 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 balloon (d) a flat table
23. 23.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a battery cell (d) a 30 cm ruler
24. 24.🛟 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
25. 25.True or false: a slide is an inclined plane. (a) False (b) True
26. 26.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
27. 27.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a crane (c) a ramp (d) a see-saw
28. 28.⚖️ 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 kind of coins (c) distance from the pencil
29. 29.True or false: a ramp is a wheel and axle. (a) True (b) False
30. 30.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the same ruler (b) distance from the pencil (c) which side goes down
31. 31.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a bottle opener (c) a tap handle (d) a sloping road
32. 32.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the axle (c) the load (d) the effort
33. 33.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
34. 34.⚖️ 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 same ruler (d) the kind of coins
35. 35.⚖️ 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 change it (b) we keep it the same (c) we measure it
36. 36.True or false: a see-saw is an inclined plane. (a) False (b) True
37. 37.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a magnet (c) a battery cell (d) a balloon
38. 38.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
39. 39.⚖️ 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) True (b) False
40. 40.⚖️ 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 keep it the same (b) we change it (c) we measure it

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