Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 608 · 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.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) easier (c) impossible (d) the same
2. 2.⚖️ 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 kind of coins (c) the number of coins (d) which side goes down
3. 3.True or false: a flagpole uses a pulley. (a) True (b) False
4. 4.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) the right side (c) the left side (d) both go up
5. 5.⚖️ 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 keep it the same (c) we measure it
6. 6.⚖️ 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) the kind of coins (b) distance from the pencil (c) the same ruler (d) the number of coins
7. 7.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
8. 8.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
9. 9.⚙️ Which of these is a lever? (a) a slide (b) a crane (c) a see-saw (d) a ramp
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a battery cell (c) a round pencil (d) a flat table
11. 11.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the lid gets softer (c) the spoon is magnetic (d) the spoon is hot
12. 12.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 12 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
13. 13.⚖️ 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 measure it (b) we keep it the same (c) we change it
14. 14.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
15. 15.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a see-saw (c) a slide (d) a spoon lifting a lid
16. 16.⚙️ Which of these uses a pulley? (a) a doorknob (b) a ramp (c) a crowbar (d) a well pulley
17. 17.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) False (b) True
19. 19.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
20. 20.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a 30 cm ruler (d) a balloon
21. 21.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
22. 22.True or false: a ramp is an inclined plane. (a) True (b) False
23. 23.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
24. 24.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
26. 26.🛟 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
27. 27.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
28. 28.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) yeast (c) a flat table (d) a round pencil
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a magnet (d) coins of one kind
30. 30.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) a 30 cm ruler (c) coins of one kind (d) a round pencil
31. 31.True or false: a doorknob is a wheel and axle. (a) False (b) True
32. 32.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) always 10 (c) equal on both sides (d) bigger on the left
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
34. 34.⚙️ Which of these is a lever? (a) a tap handle (b) a doorknob (c) a spoon lifting a lid (d) a slide
35. 35.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a bottle opener (c) a doorknob (d) a well pulley
36. 36.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
37. 37.⚖️ 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
38. 38.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
39. 39.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a battery cell (c) a flat table (d) turmeric powder
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 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?

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