Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 274 · 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.⚖️ 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
2. 2.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a bottle opener (c) a crowbar (d) a sloping road
3. 3.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) impossible (c) harder (d) the same
4. 4.⚖️ 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
5. 5.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) turmeric powder (d) a flat table
6. 6.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit on the middle (c) sit closer to middle (d) sit farther from middle
7. 7.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a ramp (c) a spoon lifting a lid (d) a flagpole
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) neither, it balances (b) the left side (c) both go up (d) the right side
9. 9.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
10. 10.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) False (b) True
11. 11.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) bend it till it snaps (d) stand on the ruler
12. 12.🧺 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 magnet (d) a round pencil
13. 13.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
14. 14.⚙️ Which simple machine is a doorknob? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
15. 15.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a flat table (c) a magnet (d) a balloon
16. 16.⚖️ 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 change it (b) we keep it the same (c) we measure it
17. 17.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
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) which side goes down (b) the number of coins (c) distance from the pencil (d) the same ruler
19. 19.⚖️ 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 measure it (b) we change it (c) we keep it the same
20. 20.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “where the pencil is”? (a) we measure it (b) we keep it the same (c) we change it
21. 21.⚖️ 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
22. 22.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) yeast (d) a round pencil
24. 24.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
25. 25.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a battery cell (c) a round pencil (d) coins of one kind
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
27. 27.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
28. 28.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
29. 29.⚖️ What is the turning point of a lever called? (a) the axle (b) the effort (c) the fulcrum (d) the load
30. 30.⚖️ 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
31. 31.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
32. 32.⚖️ 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
33. 33.⚙️ Which of these is a lever? (a) a steering wheel (b) a flagpole (c) a ramp (d) a bottle opener
34. 34.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a round pencil (c) a 30 cm ruler (d) a mirror
35. 35.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a crane (c) a slide (d) a bottle opener
36. 36.True or false: a crane uses a pulley. (a) False (b) True
37. 37.⚖️ 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?
38. 38.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
39. 39.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
40. 40.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed

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