Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 434 · 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) which side goes down (b) distance from the pencil (c) where the pencil is (d) the same ruler
2. 2.True or false: a flagpole uses a pulley. (a) False (b) True
3. 3.⚙️ Which of these is a lever? (a) a steering wheel (b) a spoon lifting a lid (c) a ramp (d) a sloping road
4. 4.⚙️ Which of these is a lever? (a) a crane (b) a flagpole (c) a sloping road (d) a crowbar
5. 5.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 12 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a 30 cm ruler (c) a flat table (d) coins of one kind
7. 7.True or false: a ramp is an inclined plane. (a) True (b) False
8. 8.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
9. 9.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a sloping road (c) a see-saw (d) a doorknob
10. 10.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
11. 11.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a steering wheel (c) a spoon lifting a lid (d) a crowbar
12. 12.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
13. 13.⚖️ 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 measure it (c) we change it
14. 14.⚙️ Which of these is a lever? (a) a ramp (b) a slide (c) a flagpole (d) a see-saw
15. 15.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
16. 16.⚖️ 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
17. 17.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
18. 18.⚖️ 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
19. 19.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
20. 20.⚙️ Which of these is a lever? (a) a sloping road (b) a bottle opener (c) a slide (d) a tap handle
21. 21.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
22. 22.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a mirror (c) a 30 cm ruler (d) a magnet
23. 23.⚖️ 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 change it (b) we measure it (c) we keep it the same
24. 24.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a round pencil (c) coins of one kind (d) a 30 cm ruler
25. 25.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) yeast (d) coins of one kind
26. 26.⚖️ 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
27. 27.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too cold (d) they are too shiny
28. 28.True or false: a sloping road is a wheel and axle. (a) True (b) False
29. 29.⚖️ 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?
30. 30.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a tap handle (c) a slide (d) a well pulley
31. 31.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) harder (d) impossible
32. 32.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 3 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
34. 34.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 5 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
36. 36.⚖️ 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 change it (b) we measure it (c) we keep it the same
37. 37.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
38. 38.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) the left side (b) both go up (c) the right side (d) neither, it balances
39. 39.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) False (b) True

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