Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 940 · 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 simple machine is a flagpole? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
2. 2.True or false: a balloon is needed for the ruler lever. (a) True (b) False
3. 3.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 3 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
4. 4.⚖️ 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
5. 5.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a bottle opener (c) a ramp (d) a slide
6. 6.⚙️ Which simple machine is a ramp? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
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 keep it the same (c) we measure it
8. 8.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are magnetic (c) they are too cold (d) they may swallow them
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a mirror (c) a 30 cm ruler (d) a round pencil
10. 10.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a 30 cm ruler (d) a balloon
11. 11.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
12. 12.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) yeast (c) a flat table (d) coins of one kind
13. 13.⚖️ 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) which side goes down (c) the same ruler
14. 14.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the spoon is hot (c) the spoon is magnetic (d) the lid gets softer
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) where the pencil is (b) the same ruler (c) which side goes down (d) distance from the pencil
16. 16.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
17. 17.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a magnet (c) a 30 cm ruler (d) a flat table
19. 19.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the fulcrum (d) the load
20. 20.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) press it gently (d) bend it till it snaps
21. 21.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) False (b) True
22. 22.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) a magnet (c) a mirror (d) a battery cell
23. 23.⚖️ 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
24. 24.⚖️ 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) False (b) True
25. 25.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
26. 26.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
27. 27.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a doorknob (c) a flagpole (d) a slide
28. 28.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 2 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
30. 30.⚖️ 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
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
32. 32.True or false: a crane is a lever. (a) True (b) False
33. 33.True or false: a flat table is needed for the ruler lever. (a) False (b) True
34. 34.⚙️ Which of these is a lever? (a) a ramp (b) a crane (c) a sloping road (d) a spoon lifting a lid
35. 35.🔮 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) the right side (c) neither, it balances (d) both go up
36. 36.⚖️ 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) distance from the pencil (c) where the pencil is
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
38. 38.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a round pencil (c) yeast (d) a magnet
39. 39.True or false: a doorknob is a wheel and axle. (a) True (b) False
40. 40.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a well pulley (c) a sloping road (d) a doorknob

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