Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 477 · 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.🧺 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 30 cm ruler
2. 2.True or false: a sloping road is a wheel and axle. (a) True (b) False
3. 3.True or false: a sloping road is a lever. (a) False (b) True
4. 4.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too shiny (c) they are magnetic (d) they are too cold
5. 5.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) a flat table (c) coins of one kind (d) a 30 cm ruler
6. 6.True or false: yeast is not needed for the ruler lever. (a) False (b) True
7. 7.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) yeast (c) a magnet (d) a flat table
8. 8.🛟 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
9. 9.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) a lever boosts your push (c) the spoon is magnetic (d) the spoon is hot
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a balloon (c) a flat table (d) a 30 cm ruler
11. 11.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) easier (d) impossible
12. 12.⚙️ Which simple machine is a tap handle? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
13. 13.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a spoon lifting a lid (c) a sloping road (d) a well pulley
14. 14.True or false: a mirror is needed for the ruler lever. (a) True (b) False
15. 15.⚖️ 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) the kind of coins (c) the same ruler (d) distance from the pencil
16. 16.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit on the middle (c) jump up and down (d) sit farther from middle
17. 17.True or false: a steering wheel is a wheel and axle. (a) True (b) False
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) True (b) False
19. 19.True or false: a magnet is needed for the ruler lever. (a) False (b) True
20. 20.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
21. 21.🔮 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 right side (b) neither, it balances (c) both go up (d) the left side
22. 22.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
23. 23.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the effort (c) the load (d) the axle
24. 24.⚖️ 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 keep it the same (c) we measure it
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 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.⚖️ A ruler balances on a pencil at its middle. You place 4 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?
27. 27.🧺 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
28. 28.⚙️ Which of these uses a pulley? (a) a tap handle (b) a slide (c) a bottle opener (d) a well pulley
29. 29.True or false: a crane uses a pulley. (a) False (b) True
30. 30.⚙️ Which of these is a lever? (a) a steering wheel (b) a spoon lifting a lid (c) a tap handle (d) a crane
31. 31.True or false: a slide is an inclined plane. (a) True (b) False
32. 32.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) a balloon (c) a mirror (d) a battery cell
33. 33.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a mirror (c) a 30 cm ruler (d) a battery cell
34. 34.⚖️ 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
35. 35.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
36. 36.⚖️ 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
37. 37.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a flat table (d) a balloon
38. 38.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
39. 39.True or false: a balloon is needed for the ruler lever. (a) True (b) False
40. 40.True or false: a mirror is not needed for the ruler lever. (a) True (b) False

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