Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 337 · 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.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
2. 2.True or false: a slide uses a pulley. (a) False (b) True
3. 3.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the load (d) the fulcrum
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) yeast (c) a 30 cm ruler (d) a round pencil
5. 5.⚖️ 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
6. 6.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
7. 7.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
8. 8.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
9. 9.⚖️ 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?
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a magnet (d) a 30 cm ruler
11. 11.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they may swallow them (c) they are magnetic (d) they are too shiny
12. 12.True or false: a steering wheel is a lever. (a) False (b) True
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) a round pencil (c) a flat table (d) a 30 cm ruler
14. 14.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “which side goes down”? (a) we measure it (b) we change it (c) we keep it the same
15. 15.⚖️ 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) True (b) False
16. 16.⚙️ Which simple machine is a tap handle? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
17. 17.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a balloon (c) coins of one kind (d) a mirror
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is the one thing we change. (a) True (b) False
19. 19.True or false: a flagpole is an inclined plane. (a) True (b) False
20. 20.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a steering wheel (c) a ramp (d) a well pulley
21. 21.⚙️ Which simple machine is a ramp? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
23. 23.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 4 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?
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
26. 26.⚖️ 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 keep it the same (b) we measure it (c) we change it
27. 27.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) False (b) True
28. 28.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) True (b) False
29. 29.⚖️ 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 keep it the same (b) we change it (c) we measure it
30. 30.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
31. 31.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
32. 32.🧺 Do we need a mirror 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) harder (b) easier (c) the same (d) impossible
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) coins of one kind (d) turmeric powder
35. 35.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
36. 36.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
37. 37.True or false: a flagpole is a lever. (a) True (b) False
38. 38.⚙️ Which of these uses a pulley? (a) a crane (b) a crowbar (c) a tap handle (d) a slide
39. 39.⚖️ 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 kind of coins (c) the same ruler (d) the number of coins
40. 40.⚖️ 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) where the pencil is (c) distance from the pencil (d) which side goes down

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