Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 936 · 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) which side goes down (b) distance from the pencil (c) where the pencil is
2. 2.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
3. 3.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a mirror (c) a magnet (d) turmeric powder
4. 4.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a sloping road (c) a flagpole (d) a spoon lifting a lid
5. 5.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
6. 6.⚖️ 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 kind of coins
7. 7.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) True (b) False
8. 8.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) the same (d) easier
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) the left side (b) the right side (c) both go up (d) neither, it balances
10. 10.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are magnetic (c) they may swallow them (d) they are too cold
11. 11.⚖️ What is the turning point of a lever called? (a) the effort (b) the fulcrum (c) the load (d) the axle
12. 12.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
13. 13.⚖️ 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
14. 14.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
15. 15.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a doorknob (c) a crane (d) a well pulley
16. 16.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
17. 17.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a ramp (c) a sloping road (d) a well pulley
18. 18.True or false: a spoon lifting a lid is a lever. (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 kept the same? (a) distance from the pencil (b) the same ruler (c) which side goes down
20. 20.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
21. 21.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) equal on both sides (c) always 10 (d) zero
22. 22.True or false: a bottle opener is a wheel and axle. (a) False (b) True
23. 23.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit closer to middle (c) sit farther from middle (d) jump up and down
24. 24.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) False (b) True
25. 25.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a battery cell (c) a 30 cm ruler (d) coins of one kind
26. 26.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a spoon lifting a lid (c) a crane (d) a slide
27. 27.⚙️ Which of these is a wheel and axle? (a) a slide (b) a crowbar (c) a tap handle (d) a bottle opener
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 3 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
29. 29.True or false: a flat table is needed for the ruler lever. (a) True (b) False
30. 30.True or false: yeast is needed for the ruler lever. (a) False (b) True
31. 31.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the lid gets softer (c) the spoon is hot (d) a lever boosts your push
32. 32.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
33. 33.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a battery cell (c) a flat table (d) yeast
34. 34.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 4 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?
36. 36.⚖️ 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
37. 37.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 2 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
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 kept the same. (a) False (b) True
40. 40.⚖️ 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 measure it (b) we keep it the same (c) we change it

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