Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 709 · 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 well pulley uses a pulley. (a) False (b) True
2. 2.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) flick coins at faces (d) bend it till it snaps
3. 3.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
4. 4.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 10 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
5. 5.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they are too shiny (d) they may swallow them
6. 6.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) zero (c) equal on both sides (d) always 10
7. 7.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
8. 8.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a flat table (d) a magnet
9. 9.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
10. 10.⚖️ 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
11. 11.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a ramp (c) a crane (d) a flagpole
12. 12.True or false: a flat table is needed for the ruler lever. (a) True (b) False
13. 13.⚖️ 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
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) both go up (b) the left side (c) the right side (d) neither, it balances
15. 15.⚙️ Which of these uses a pulley? (a) a see-saw (b) a well pulley (c) a crowbar (d) a tap handle
16. 16.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) impossible (d) harder
17. 17.⚖️ What is the turning point of a lever called? (a) the load (b) the effort (c) the fulcrum (d) the axle
18. 18.⚖️ 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) the kind of coins (c) distance from the pencil
19. 19.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
20. 20.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
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 kept the same. (a) False (b) True
22. 22.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
23. 23.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a mirror (c) a battery cell (d) coins of one kind
24. 24.⚙️ Which of these is a lever? (a) a sloping road (b) a tap handle (c) a doorknob (d) a spoon lifting a lid
25. 25.True or false: a slide is a wheel and axle. (a) True (b) False
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 1 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?
27. 27.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) where the pencil is (b) which side goes down (c) distance from the pencil
28. 28.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) yeast (d) a round pencil
29. 29.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
30. 30.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
31. 31.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a balloon (c) a battery cell (d) yeast
32. 32.⚖️ 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) where the pencil is
33. 33.True or false: yeast is not needed for the ruler lever. (a) False (b) True
34. 34.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 5 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?
35. 35.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a balloon (d) a round pencil
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 6 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?
37. 37.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a 30 cm ruler (c) turmeric powder (d) a flat table
38. 38.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
39. 39.⚙️ Which simple machine is a doorknob? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
40. 40.⚖️ 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 same ruler (b) which side goes down (c) where the pencil is (d) the number of coins

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