Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 54 · 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 battery cell is needed for the ruler lever. (a) False (b) True
2. 2.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
3. 3.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they may swallow them (c) they are too cold (d) they are too shiny
4. 4.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) press it gently (c) stand on the ruler (d) flick coins at faces
5. 5.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a battery cell (d) a flat table
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a flat table (c) a 30 cm ruler (d) coins of one kind
7. 7.⚖️ 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 number of coins (c) which side goes down
8. 8.True or false: yeast is not needed for the ruler lever. (a) False (b) True
9. 9.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a magnet (c) a round pencil (d) a flat table
10. 10.True or false: a flagpole is a wheel and axle. (a) False (b) True
11. 11.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a crane (c) a spoon lifting a lid (d) a sloping road
12. 12.⚖️ 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 keep it the same (b) we measure it (c) we change it
13. 13.⚖️ A ruler balances on a pencil at its middle. You place 2 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?
14. 14.🔮 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) neither, it balances (c) the right side (d) both go up
15. 15.True or false: a bottle opener is a lever. (a) False (b) True
16. 16.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
17. 17.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) where the pencil is (c) distance from the pencil
18. 18.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 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?
19. 19.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) easier (d) harder
20. 20.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
21. 21.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
22. 22.⚙️ Which of these is a lever? (a) a doorknob (b) a ramp (c) a crowbar (d) a flagpole
23. 23.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a mirror (c) a round pencil (d) a magnet
24. 24.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
25. 25.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) a lever boosts your push (c) the spoon is hot (d) the lid gets softer
26. 26.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) distance from the pencil (b) which side goes down (c) where the pencil is (d) the number of coins
27. 27.⚖️ 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) False (b) True
28. 28.True or false: a spoon lifting a lid is a wheel and axle. (a) False (b) True
29. 29.⚖️ 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
30. 30.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a 30 cm ruler (c) a mirror (d) a magnet
31. 31.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
32. 32.True or false: a bottle opener is a wheel and axle. (a) False (b) True
33. 33.True or false: a see-saw is an inclined plane. (a) True (b) False
34. 34.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
35. 35.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the axle (c) the effort (d) the load
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 2 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?
37. 37.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
38. 38.⚖️ 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 keep it the same (b) we change it (c) we measure it
39. 39.⚖️ 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 kind of coins (b) distance from the pencil (c) which side goes down
40. 40.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed

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