Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 758 · 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.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
2. 2.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
3. 3.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) the same (d) harder
4. 4.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
5. 5.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the number of coins (b) which side goes down (c) distance from the pencil (d) the same ruler
6. 6.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are magnetic (c) they may swallow them (d) they are too cold
7. 7.True or false: a crowbar is a wheel and axle. (a) True (b) False
8. 8.⚖️ What is the turning point of a lever called? (a) the effort (b) the fulcrum (c) the axle (d) the load
9. 9.True or false: a flagpole uses a pulley. (a) False (b) True
10. 10.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a crowbar (c) a slide (d) a crane
11. 11.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is the one thing we change. (a) True (b) False
12. 12.⚖️ 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 change it (b) we measure it (c) we keep it the same
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) turmeric powder (c) coins of one kind (d) a round pencil
14. 14.⚖️ 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 same ruler (b) where the pencil is (c) the number of coins (d) distance from the pencil
15. 15.True or false: a magnet is needed for the ruler lever. (a) True (b) False
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) yeast (c) a round pencil (d) a 30 cm ruler
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) a magnet
18. 18.⚙️ Which of these is a wheel and axle? (a) a crane (b) a bottle opener (c) a crowbar (d) a doorknob
19. 19.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a battery cell (c) coins of one kind (d) a round pencil
20. 20.⚖️ 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 keep it the same (b) we measure it (c) we change it
21. 21.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 8 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?
22. 22.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) a round pencil (c) coins of one kind (d) a flat table
23. 23.⚙️ Which of these is a wheel and axle? (a) a crane (b) a ramp (c) a bottle opener (d) a steering wheel
24. 24.⚙️ Which of these uses a pulley? (a) a tap handle (b) a bottle opener (c) a ramp (d) a flagpole
25. 25.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
27. 27.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a mirror (c) a round pencil (d) coins of one kind
28. 28.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) turmeric powder (d) a flat table
29. 29.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
30. 30.True or false: a sloping road is a wheel and axle. (a) False (b) True
31. 31.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a battery cell (c) turmeric powder (d) a balloon
32. 32.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a mirror (c) a battery cell (d) yeast
33. 33.⚖️ 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
34. 34.⚖️ 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 same ruler (b) distance from the pencil (c) which side goes down
35. 35.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “which side goes down”? (a) we change it (b) we measure it (c) we keep it the same
36. 36.⚖️ 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
37. 37.⚙️ Which of these is a lever? (a) a steering wheel (b) a flagpole (c) a see-saw (d) a ramp
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 6 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?
39. 39.True or false: a flat table is needed for the ruler lever. (a) True (b) False
40. 40.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) bend it till it snaps (d) press it gently

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