Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 88 · 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.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is magnetic (c) the spoon is hot (d) a lever boosts your push
2. 2.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) True (b) False
3. 3.⚖️ 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 measure it (c) we keep it the same
4. 4.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) the same (d) easier
5. 5.⚙️ Which of these uses a pulley? (a) a well pulley (b) a crowbar (c) a bottle opener (d) a sloping road
6. 6.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) flick coins at faces (d) press it gently
7. 7.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
8. 8.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
9. 9.⚖️ What is the turning point of a lever called? (a) the effort (b) the fulcrum (c) the load (d) the axle
10. 10.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they may swallow them (c) they are too shiny (d) they are magnetic
11. 11.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a magnet (d) a round pencil
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) yeast (d) a round pencil
14. 14.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) equal on both sides (c) bigger on the left (d) zero
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (a) False (b) True
16. 16.⚖️ 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 measure it (b) we keep it the same (c) we change it
17. 17.⚙️ Which simple machine is a flagpole? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
18. 18.True or false: a doorknob is a lever. (a) True (b) False
19. 19.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
20. 20.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a tap handle (c) a crowbar (d) a bottle opener
21. 21.True or false: a well pulley is a wheel and axle. (a) True (b) False
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) coins of one kind (d) a balloon
24. 24.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
25. 25.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) True (b) False
26. 26.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit on the middle (c) sit closer to middle (d) jump up and down
27. 27.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a mirror (d) a flat table
28. 28.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a magnet (d) a round pencil
29. 29.⚖️ 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
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 4 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
31. 31.⚖️ 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 number of coins (b) distance from the pencil (c) the kind of coins (d) which side goes down
32. 32.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
34. 34.⚙️ Which of these uses a pulley? (a) a slide (b) a spoon lifting a lid (c) a flagpole (d) a sloping road
35. 35.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
37. 37.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
38. 38.⚖️ 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
39. 39.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
40. 40.True or false: yeast is needed for the ruler lever. (a) True (b) False

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