Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 104 · 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 hot (c) the spoon is magnetic (d) a lever boosts your push
2. 2.🔮 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 left side (c) both go up (d) the right side
3. 3.⚖️ 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
4. 4.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) a battery cell (c) yeast (d) a mirror
5. 5.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) yeast (d) a flat table
6. 6.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
7. 7.⚖️ 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
8. 8.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
9. 9.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
10. 10.True or false: a steering wheel is a wheel and axle. (a) False (b) True
11. 11.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the fulcrum (d) the axle
12. 12.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they are too shiny (d) they may swallow them
13. 13.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a see-saw (c) a bottle opener (d) a spoon lifting a lid
14. 14.⚙️ Which of these is a lever? (a) a crane (b) a well pulley (c) a see-saw (d) a slide
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) True (b) False
16. 16.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a flat table (d) a battery cell
17. 17.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a see-saw (c) a sloping road (d) a flagpole
18. 18.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
19. 19.⚖️ 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
20. 20.⚖️ 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) False (b) True
21. 21.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
22. 22.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) flick coins at faces (c) press it gently (d) bend it till it snaps
23. 23.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) the same (c) harder (d) impossible
24. 24.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is the one thing we change. (a) True (b) False
25. 25.⚖️ 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
26. 26.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
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 battery cell (d) a flat table
28. 28.True or false: a doorknob is a wheel and axle. (a) False (b) True
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
30. 30.True or false: a tap handle is a wheel and axle. (a) False (b) True
31. 31.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) jump up and down (c) sit farther from middle (d) sit on the middle
32. 32.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
33. 33.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) bigger on the left (c) zero (d) equal on both sides
34. 34.⚖️ 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 measure it (b) we keep it the same (c) we change it
35. 35.⚖️ 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
36. 36.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a bottle opener (c) a sloping road (d) a well pulley
37. 37.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a mirror (c) a flat table (d) a 30 cm ruler
38. 38.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “where the pencil is”? (a) we change it (b) we measure it (c) we keep it the same
39. 39.⚖️ 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) where the pencil is (c) which side goes down (d) distance from the pencil
40. 40.True or false: a crowbar is a lever. (a) True (b) False

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