Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 603 · 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? What do we do with “the same ruler”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) zero (c) equal on both sides (d) always 10
3. 3.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) bend it till it snaps (d) flick coins at faces
4. 4.True or false: a well pulley is an inclined plane. (a) True (b) False
5. 5.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) False (b) True
7. 7.⚖️ 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
8. 8.🧺 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 round pencil (d) yeast
9. 9.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
10. 10.🧺 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 battery cell (d) a flat table
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 8 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
12. 12.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
13. 13.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) coins of one kind (c) a magnet (d) yeast
14. 14.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a round pencil (c) yeast (d) a battery cell
15. 15.True or false: a balloon is needed for the ruler lever. (a) False (b) True
16. 16.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a bottle opener (c) a see-saw (d) a tap handle
17. 17.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “distance from the pencil”? (a) we measure it (b) we keep it the same (c) we change it
18. 18.⚖️ 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) distance from the pencil (c) the same ruler (d) which side goes down
19. 19.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
20. 20.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
21. 21.⚖️ What is the turning point of a lever called? (a) the axle (b) the effort (c) the load (d) the fulcrum
22. 22.True or false: a battery cell is needed for the ruler lever. (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: distance from the pencil is the one thing we change. (a) True (b) False
24. 24.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the number of coins (b) distance from the pencil (c) which side goes down
25. 25.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a flat table (c) a magnet (d) a balloon
26. 26.⚙️ Which simple machine is a doorknob? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
27. 27.⚖️ 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) the same ruler (c) which side goes down
28. 28.True or false: a flagpole is a lever. (a) True (b) False
29. 29.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) jump up and down (c) sit on the middle (d) sit farther from middle
30. 30.🔮 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) the left side (c) the right side (d) neither, it balances
31. 31.⚖️ 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
32. 32.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
33. 33.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) easier (d) harder
34. 34.⚖️ 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 change it (c) we keep it the same
35. 35.⚖️ 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) which side goes down (c) distance from the pencil (d) where the pencil is
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 3 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?
37. 37.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a flagpole (c) a sloping road (d) a well pulley
38. 38.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
39. 39.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
40. 40.True or false: a slide is an inclined plane. (a) True (b) False

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