Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 595 · 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? Which of these is the one thing we change? (a) distance from the pencil (b) which side goes down (c) where the pencil is (d) the kind of coins
2. 2.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) bend it till it snaps (d) press it gently
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a balloon (c) a 30 cm ruler (d) coins of one kind
4. 4.⚙️ Which of these is a lever? (a) a flagpole (b) a crane (c) a see-saw (d) a well pulley
5. 5.⚖️ 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
6. 6.⚖️ 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 change it (b) we keep it the same (c) we measure it
7. 7.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
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) both go up (c) the left side (d) the right side
9. 9.⚖️ 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
10. 10.⚖️ 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 keep it the same (b) we change it (c) we measure it
11. 11.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) impossible (d) harder
12. 12.True or false: a magnet is needed for the ruler lever. (a) False (b) True
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) yeast (c) a flat table (d) a round pencil
14. 14.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) coins of one kind (d) turmeric powder
15. 15.True or false: a balloon is needed for the ruler lever. (a) True (b) False
16. 16.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a steering wheel (c) a spoon lifting a lid (d) a ramp
17. 17.⚖️ 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
18. 18.True or false: a sloping road is a wheel and axle. (a) False (b) True
19. 19.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) coins of one kind (d) a magnet
20. 20.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) yeast (c) a magnet (d) a round pencil
21. 21.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
22. 22.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) True (b) False
23. 23.⚙️ Which simple machine is a crane? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
24. 24.⚖️ What is the turning point of a lever called? (a) the axle (b) the load (c) the fulcrum (d) the effort
25. 25.⚖️ 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
26. 26.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) a balloon (c) yeast (d) a mirror
27. 27.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 5 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
28. 28.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a magnet (d) coins of one kind
29. 29.True or false: a crane is a lever. (a) True (b) False
30. 30.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a sloping road (c) a flagpole (d) a steering wheel
31. 31.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit farther from middle (c) sit closer to middle (d) jump up and down
32. 32.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
33. 33.True or false: a ramp uses a pulley. (a) True (b) False
34. 34.⚙️ Which of these is an inclined plane? (a) a crane (b) a steering wheel (c) a doorknob (d) a slide
35. 35.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) always 10 (c) zero (d) bigger on the left
36. 36.⚖️ 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) the number of coins (c) which side goes down (d) distance from the pencil
37. 37.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a flat table (c) a round pencil (d) coins of one kind
38. 38.⚙️ Which simple machine is a slide? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
39. 39.True or false: a tap handle is a wheel and axle. (a) False (b) True
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 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?

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