Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 642 · 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 round pencil (b) a 30 cm ruler (c) a balloon (d) coins of one kind
2. 2.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) bigger on the left (c) always 10 (d) zero
3. 3.⚖️ 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) distance from the pencil (c) the kind of coins (d) which side goes down
4. 4.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
5. 5.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) easier (d) impossible
6. 6.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
7. 7.⚙️ Which of these is a lever? (a) a slide (b) a crane (c) a doorknob (d) a spoon lifting a lid
8. 8.⚖️ 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 measure it (c) we keep it the same
9. 9.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a 30 cm ruler (c) a round pencil (d) a magnet
10. 10.🛟 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
11. 11.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) where the pencil is (b) the same ruler (c) which side goes down (d) the number of coins
12. 12.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a well pulley (c) a steering wheel (d) a sloping road
13. 13.🛟 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
14. 14.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) both go up (c) the right side (d) the left side
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 1 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
16. 16.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a tap handle (c) a crowbar (d) a crane
17. 17.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a slide (c) a bottle opener (d) a doorknob
18. 18.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a crowbar (c) a slide (d) a flagpole
19. 19.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a 30 cm ruler (c) a flat table (d) a round pencil
20. 20.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
21. 21.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
22. 22.⚖️ What is the turning point of a lever called? (a) the load (b) the fulcrum (c) the axle (d) the effort
23. 23.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
24. 24.True or false: a steering wheel is a lever. (a) True (b) False
25. 25.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the spoon is hot (c) the lid gets softer (d) the spoon is magnetic
26. 26.True or false: a bottle opener is a lever. (a) True (b) False
27. 27.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
28. 28.⚖️ 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) which side goes down (c) where the pencil is
29. 29.⚖️ 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 change it (c) we keep it the same
30. 30.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a magnet (c) a mirror (d) turmeric powder
31. 31.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
32. 32.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
33. 33.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a battery cell (c) a balloon (d) a magnet
34. 34.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
35. 35.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a battery cell (c) a round pencil (d) a 30 cm ruler
36. 36.⚖️ 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
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
38. 38.⚙️ Which of these is an inclined plane? (a) a ramp (b) a crowbar (c) a flagpole (d) a bottle opener
39. 39.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
40. 40.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a crane (c) a sloping road (d) a bottle opener

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