Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 933 · 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.⚙️ Which of these is an inclined plane? (a) a crane (b) a steering wheel (c) a flagpole (d) a sloping road
2. 2.🧺 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 battery cell (d) coins of one kind
3. 3.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
4. 4.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are too shiny (c) they may swallow them (d) they are magnetic
5. 5.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) flick coins at faces (c) press it gently (d) stand on the ruler
6. 6.🔮 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) neither, it balances (c) the left side (d) the right side
7. 7.⚖️ 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
8. 8.⚖️ 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) True (b) False
9. 9.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
10. 10.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a battery cell (c) a magnet (d) a flat table
11. 11.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
12. 12.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
13. 13.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
14. 14.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the lid gets softer (c) a lever boosts your push (d) the spoon is magnetic
15. 15.⚙️ Which of these uses a pulley? (a) a see-saw (b) a spoon lifting a lid (c) a doorknob (d) a well pulley
16. 16.True or false: a bottle opener uses a pulley. (a) False (b) True
17. 17.⚖️ A ruler balances on a pencil at its middle. You place 4 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?
18. 18.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 8 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
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 change it (b) we measure it (c) we keep it the same
20. 20.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
21. 21.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 10 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
22. 22.True or false: a steering wheel is a wheel and axle. (a) True (b) False
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.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a well pulley (c) a flagpole (d) a ramp
25. 25.⚖️ What is the turning point of a lever called? (a) the axle (b) the effort (c) the load (d) the fulcrum
26. 26.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
27. 27.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) a 30 cm ruler (c) a round pencil (d) coins of one kind
28. 28.⚖️ 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 kind of coins (b) where the pencil is (c) which side goes down (d) the same ruler
29. 29.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) True (b) False
30. 30.⚖️ 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
31. 31.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) yeast (d) a flat table
32. 32.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
33. 33.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) a 30 cm ruler (c) coins of one kind (d) a round pencil
34. 34.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
35. 35.⚙️ Which of these is a lever? (a) a steering wheel (b) a spoon lifting a lid (c) a doorknob (d) a ramp
36. 36.⚖️ 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) the kind of coins (d) the same ruler
37. 37.True or false: a bottle opener is a lever. (a) True (b) False
38. 38.🧺 Which of these is needed for the ruler lever? (a) yeast (b) turmeric powder (c) a balloon (d) coins of one kind
39. 39.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
40. 40.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a flat table (c) a 30 cm ruler (d) a battery cell

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