Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 134 · 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.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
2. 2.⚖️ What is the turning point of a lever called? (a) the axle (b) the load (c) the fulcrum (d) the effort
3. 3.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) a 30 cm ruler (c) coins of one kind (d) a flat table
5. 5.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) a lever boosts your push (c) the spoon is magnetic (d) the spoon is hot
6. 6.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) a magnet (d) a round pencil
7. 7.True or false: a ramp is a wheel and axle. (a) False (b) True
8. 8.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
9. 9.⚖️ 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
10. 10.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a battery cell (c) a balloon (d) a 30 cm ruler
11. 11.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) coins of one kind (c) a magnet (d) a balloon
12. 12.⚙️ Which simple machine is a crane? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
13. 13.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) turmeric powder (c) yeast (d) a magnet
14. 14.⚖️ 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) distance from the pencil (c) the number of coins (d) where the pencil is
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) False (b) True
16. 16.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
17. 17.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) stand on the ruler (c) press it gently (d) flick coins at faces
18. 18.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) harder (c) impossible (d) easier
19. 19.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) a battery cell (d) coins of one kind
20. 20.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) bigger on the left (c) equal on both sides (d) always 10
21. 21.⚙️ Which of these is an inclined plane? (a) a ramp (b) a tap handle (c) a see-saw (d) a bottle opener
22. 22.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) the same ruler (c) distance from the pencil (d) the kind of coins
23. 23.⚖️ 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
24. 24.⚙️ Which of these is an inclined plane? (a) a slide (b) a spoon lifting a lid (c) a well pulley (d) a crowbar
25. 25.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
26. 26.🔮 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) the right side (c) the left side (d) both go up
27. 27.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
28. 28.True or false: yeast is not needed for the ruler lever. (a) False (b) True
29. 29.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a sloping road (c) a crane (d) a crowbar
30. 30.True or false: a magnet is needed for the ruler lever. (a) True (b) False
31. 31.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
32. 32.⚙️ Which of these is a lever? (a) a flagpole (b) a tap handle (c) a slide (d) a crowbar
33. 33.⚖️ 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
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a flat table (c) coins of one kind (d) a round pencil
35. 35.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a flat table (c) a round pencil (d) coins of one kind
37. 37.⚖️ 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) True (b) False
38. 38.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a steering wheel (c) a bottle opener (d) a spoon lifting a lid
39. 39.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
40. 40.⚖️ 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

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