Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 886 · 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 flat table (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 2 coins 8 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
3. 3.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a see-saw (c) a flagpole (d) a slide
4. 4.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) press it gently (c) bend it till it snaps (d) stand on the ruler
5. 5.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
6. 6.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) a battery cell (c) a mirror (d) a magnet
7. 7.True or false: a well pulley uses a pulley. (a) False (b) True
8. 8.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 1 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
9. 9.True or false: a ramp is an inclined plane. (a) False (b) True
10. 10.True or false: yeast is needed for the ruler lever. (a) False (b) True
11. 11.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too cold (d) they are too shiny
12. 12.True or false: a ramp is a lever. (a) False (b) True
13. 13.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is hot (c) the spoon is magnetic (d) a lever boosts your push
14. 14.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) turmeric powder (c) a round pencil (d) coins of one kind
15. 15.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
16. 16.⚖️ What is the turning point of a lever called? (a) the effort (b) the fulcrum (c) the axle (d) the load
17. 17.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 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?
18. 18.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
19. 19.⚙️ Which of these is a lever? (a) a steering wheel (b) a see-saw (c) a sloping road (d) a well pulley
20. 20.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
21. 21.⚖️ 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
22. 22.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
23. 23.⚖️ 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) True (b) False
24. 24.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
25. 25.True or false: a slide is an inclined plane. (a) False (b) True
26. 26.True or false: a crane is an inclined plane. (a) False (b) True
27. 27.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a round pencil (c) a battery cell (d) yeast
28. 28.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a flat table (c) turmeric powder (d) a balloon
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) yeast (c) a flat table (d) coins of one kind
30. 30.⚖️ 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
31. 31.⚖️ 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
32. 32.⚙️ Which simple machine is a well pulley? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
33. 33.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
34. 34.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
35. 35.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a bottle opener (c) a slide (d) a tap handle
36. 36.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a well pulley (c) a flagpole (d) a steering wheel
37. 37.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) easier (c) impossible (d) the same
38. 38.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) coins of one kind (c) a 30 cm ruler (d) a flat table
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) a battery cell
40. 40.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a 30 cm ruler (d) a mirror

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