Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 592 · 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.True or false: a well pulley is a lever. (a) False (b) True
2. 2.True or false: a balloon is needed for the ruler lever. (a) True (b) False
3. 3.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a crowbar (c) a sloping road (d) a well pulley
4. 4.True or false: a magnet is needed for the ruler lever. (a) True (b) False
5. 5.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the lid gets softer (c) a lever boosts your push (d) the spoon is magnetic
6. 6.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a 30 cm ruler (c) a round pencil (d) coins of one kind
7. 7.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) turmeric powder
8. 8.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they are too shiny (d) they may swallow them
9. 9.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
10. 10.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
11. 11.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
12. 12.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) press it gently (d) flick coins at faces
13. 13.⚖️ 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) distance from the pencil (b) the same ruler (c) which side goes down (d) where the pencil is
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 what we measure. (a) True (b) False
15. 15.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
16. 16.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit closer to middle (c) jump up and down (d) sit farther from middle
17. 17.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
18. 18.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a crowbar (c) a crane (d) a slide
19. 19.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
20. 20.⚖️ 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 measure it (b) we keep it the same (c) we change it
21. 21.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) coins of one kind (d) a battery cell
22. 22.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a round pencil (d) a balloon
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
25. 25.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a 30 cm ruler (d) turmeric powder
27. 27.⚖️ 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
28. 28.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
29. 29.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
30. 30.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) False (b) True
31. 31.⚙️ Which of these uses a pulley? (a) a sloping road (b) a tap handle (c) a flagpole (d) a see-saw
32. 32.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the axle (c) the effort (d) the load
33. 33.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
34. 34.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) easier (d) harder
35. 35.True or false: a flagpole is a lever. (a) False (b) True
36. 36.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (a) False (b) True
37. 37.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a balloon (d) a round pencil
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 5 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?
39. 39.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) turmeric powder (c) yeast (d) coins of one kind
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 10 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?

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