Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 589 · 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.⚖️ 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) where the pencil is (c) distance from the pencil
2. 2.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a 30 cm ruler (c) turmeric powder (d) a battery cell
3. 3.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) the number of coins (c) distance from the pencil (d) where the pencil is
4. 4.⚖️ 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) the spoon is magnetic (d) a lever boosts your push
5. 5.True or false: a sloping road is a lever. (a) True (b) False
6. 6.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) the same (c) impossible (d) harder
7. 7.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
8. 8.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a balloon (c) turmeric powder (d) yeast
9. 9.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
10. 10.⚙️ Which of these is a lever? (a) a steering wheel (b) a well pulley (c) a sloping road (d) a see-saw
11. 11.⚖️ 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 measure it (c) we change it
12. 12.🔮 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) the left side (c) both go up (d) neither, it balances
13. 13.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
14. 14.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) True (b) False
16. 16.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a round pencil (c) coins of one kind (d) a 30 cm ruler
18. 18.⚙️ Which of these is a lever? (a) a ramp (b) a crowbar (c) a crane (d) a flagpole
19. 19.True or false: yeast is not needed for the ruler lever. (a) False (b) True
20. 20.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
21. 21.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 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) turmeric powder (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
24. 24.⚖️ 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?
25. 25.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
26. 26.True or false: a crowbar is a wheel and axle. (a) True (b) False
27. 27.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the same ruler”? (a) we measure it (b) we change it (c) we keep it the same
28. 28.⚖️ 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
29. 29.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
30. 30.⚖️ 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) False (b) True
31. 31.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the load (d) the effort
32. 32.⚖️ 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 measure it (b) we keep it the same (c) we change it
33. 33.⚖️ 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) False (b) True
34. 34.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) bend it till it snaps (d) stand on the ruler
35. 35.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) yeast (c) a battery cell (d) a balloon
36. 36.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
37. 37.⚙️ Which of these uses a pulley? (a) a see-saw (b) a flagpole (c) a bottle opener (d) a slide
38. 38.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
39. 39.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a magnet (c) turmeric powder (d) coins of one kind
40. 40.⚙️ Which of these uses a pulley? (a) a crane (b) a spoon lifting a lid (c) a doorknob (d) a crowbar

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