Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 794 · 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 mirror is needed for the ruler lever. (a) False (b) True
2. 2.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 8 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
3. 3.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the axle (d) the fulcrum
4. 4.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
5. 5.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a mirror (c) coins of one kind (d) a battery cell
6. 6.⚖️ 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
7. 7.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) bigger on the left (c) zero (d) always 10
8. 8.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) neither, it balances (c) the left side (d) the right side
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a round pencil (c) coins of one kind (d) a 30 cm ruler
10. 10.⚖️ 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) a lever boosts your push (d) the spoon is magnetic
11. 11.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) coins of one kind (c) a flat table (d) a 30 cm ruler
12. 12.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a spoon lifting a lid (c) a doorknob (d) a flagpole
13. 13.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the number of coins”? (a) we change it (b) we keep it the same (c) we measure it
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
15. 15.True or false: a spoon lifting a lid is a lever. (a) False (b) True
16. 16.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) a mirror (d) coins of one kind
17. 17.⚖️ 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) True (b) False
18. 18.⚖️ 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 same ruler (b) the kind of coins (c) distance from the pencil (d) which side goes down
19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) False (b) True
20. 20.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they may swallow them (d) they are too shiny
21. 21.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) stand on the ruler (c) flick coins at faces (d) press it gently
22. 22.True or false: a crane uses a pulley. (a) False (b) True
23. 23.⚖️ 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
24. 24.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the same ruler (b) where the pencil is (c) the kind of coins (d) which side goes down
25. 25.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
26. 26.True or false: yeast is not needed for the ruler lever. (a) False (b) True
27. 27.True or false: a flat table is needed for the ruler lever. (a) False (b) True
28. 28.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a steering wheel (c) a crane (d) a slide
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
30. 30.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) a balloon (d) a round pencil
31. 31.⚙️ Which of these uses a pulley? (a) a well pulley (b) a bottle opener (c) a slide (d) a ramp
32. 32.True or false: a slide is an inclined plane. (a) True (b) False
33. 33.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a spoon lifting a lid (c) a flagpole (d) a tap handle
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a magnet (d) a 30 cm ruler
35. 35.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
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 the one thing we change. (a) False (b) True
37. 37.True or false: a spoon lifting a lid is a wheel and axle. (a) False (b) True
38. 38.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) easier (c) impossible (d) the same
39. 39.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
40. 40.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) yeast (c) a flat table (d) a round pencil

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