Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 696 · 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.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a magnet (c) a round pencil (d) coins of one kind
2. 2.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
3. 3.True or false: a spoon lifting a lid is a wheel and axle. (a) True (b) False
4. 4.⚙️ Which of these is a wheel and axle? (a) a crane (b) a slide (c) a steering wheel (d) a well pulley
5. 5.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
6. 6.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) harder (c) impossible (d) the same
7. 7.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
8. 8.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) coins of one kind (c) a flat table (d) a 30 cm ruler
9. 9.⚙️ Which simple machine is a crane? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
10. 10.⚖️ 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) the number of coins (b) the kind of coins (c) distance from the pencil (d) which side goes down
11. 11.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
12. 12.⚖️ 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
13. 13.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the spoon is magnetic (c) a lever boosts your push (d) the lid gets softer
14. 14.⚙️ Which of these uses a pulley? (a) a see-saw (b) a crane (c) a bottle opener (d) a doorknob
15. 15.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are too shiny (c) they may swallow them (d) they are magnetic
16. 16.⚖️ 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 measure it (b) we change it (c) we keep it the same
17. 17.⚙️ Which of these is a lever? (a) a tap handle (b) a flagpole (c) a see-saw (d) a steering wheel
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) True (b) False
19. 19.⚖️ 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
20. 20.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
21. 21.True or false: a ramp is a lever. (a) False (b) True
22. 22.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
23. 23.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
24. 24.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) press it gently (c) stand on the ruler (d) flick coins at faces
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 10 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
26. 26.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
27. 27.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit closer to middle (c) sit farther from middle (d) sit on the middle
28. 28.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) a round pencil (c) a 30 cm ruler (d) coins of one kind
29. 29.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) True (b) False
30. 30.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
31. 31.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
32. 32.True or false: a balloon is needed for the ruler lever. (a) False (b) True
33. 33.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a 30 cm ruler (c) a battery cell (d) a balloon
34. 34.🔮 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 right side (b) the left side (c) both go up (d) neither, it balances
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 what we measure. (a) True (b) False
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) yeast (d) a round pencil
37. 37.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the effort (c) the load (d) the axle
38. 38.⚖️ 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 measure it (b) we keep it the same (c) we change it
39. 39.True or false: a battery cell is not 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? True or false: which side goes down is the one thing we change. (a) False (b) True

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