Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 178 · 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.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) flick coins at faces (d) press it gently
2. 2.⚖️ 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 same ruler (c) distance from the pencil
3. 3.⚖️ What is the turning point of a lever called? (a) the load (b) the effort (c) the axle (d) the fulcrum
4. 4.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
5. 5.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a magnet (d) coins of one kind
6. 6.⚙️ Which of these is a lever? (a) a well pulley (b) a spoon lifting a lid (c) a ramp (d) a flagpole
7. 7.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) zero (c) equal on both sides (d) always 10
8. 8.True or false: a crane is a wheel and axle. (a) False (b) True
9. 9.🧺 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) a magnet
10. 10.True or false: a spoon lifting a lid is an inclined plane. (a) True (b) False
11. 11.⚖️ 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 8 cm to the right to balance it?
12. 12.True or false: a balloon is needed for the ruler lever. (a) False (b) True
13. 13.⚖️ 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 measure it (c) we keep it the same
14. 14.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
15. 15.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a see-saw (c) a slide (d) a well pulley
16. 16.⚖️ 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
17. 17.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
18. 18.True or false: a flagpole is a wheel and axle. (a) False (b) True
19. 19.⚖️ 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) which side goes down (b) where the pencil is (c) distance from the pencil (d) the number of coins
20. 20.⚖️ 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
21. 21.⚖️ 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
22. 22.⚖️ 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 keep it the same (c) we change it
23. 23.True or false: a bottle opener is an inclined plane. (a) True (b) False
24. 24.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
25. 25.⚖️ 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
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a round pencil (d) turmeric powder
27. 27.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
28. 28.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) a round pencil (c) coins of one kind (d) a flat table
29. 29.🛟 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
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 5 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?
31. 31.⚖️ 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
32. 32.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a battery cell (c) a balloon (d) turmeric powder
33. 33.⚙️ Which simple machine is a crowbar? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a 30 cm ruler (c) a round pencil (d) coins of one kind
35. 35.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a battery cell (c) a magnet (d) a 30 cm ruler
36. 36.⚙️ Which of these is a wheel and axle? (a) a crane (b) a bottle opener (c) a doorknob (d) a well pulley
37. 37.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
38. 38.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) coins of one kind (c) a flat table (d) a 30 cm ruler
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a round pencil (d) yeast
40. 40.⚙️ Which of these is a lever? (a) a ramp (b) a see-saw (c) a slide (d) a flagpole

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