Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 206 · 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.True or false: a ramp is a lever. (a) False (b) True
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) turmeric powder (d) a flat table
3. 3.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) zero (c) equal on both sides (d) always 10
4. 4.⚙️ Which simple machine is a crane? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
5. 5.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
6. 6.⚖️ 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) distance from the pencil (b) where the pencil is (c) the kind of coins (d) the same ruler
7. 7.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a magnet (d) a flat table
8. 8.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) flick coins at faces (d) bend it till it snaps
9. 9.⚖️ A ruler balances on a pencil at its middle. You place 4 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?
10. 10.⚖️ 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
11. 11.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a bottle opener (c) a crowbar (d) a doorknob
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a flat table (d) a battery cell
13. 13.True or false: a sloping road is a wheel and axle. (a) False (b) True
14. 14.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a balloon (c) a flat table (d) a magnet
15. 15.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a round pencil (c) a flat table (d) a balloon
16. 16.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 8 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
17. 17.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
18. 18.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
19. 19.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 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?
20. 20.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a magnet (c) a mirror (d) a 30 cm ruler
21. 21.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
22. 22.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) the same (d) easier
23. 23.⚙️ Which of these uses a pulley? (a) a sloping road (b) a doorknob (c) a crowbar (d) a crane
24. 24.⚖️ 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 number of coins (b) which side goes down (c) distance from the pencil
25. 25.⚖️ 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) True (b) False
26. 26.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a mirror (c) a round pencil (d) yeast
27. 27.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a slide (c) a ramp (d) a crane
28. 28.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
29. 29.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a ramp (c) a bottle opener (d) a tap handle
30. 30.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
31. 31.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) yeast
32. 32.⚙️ Which of these uses a pulley? (a) a crowbar (b) a see-saw (c) a tap handle (d) a flagpole
33. 33.True or false: a well pulley uses a pulley. (a) False (b) True
34. 34.True or false: a spoon lifting a lid is a wheel and axle. (a) True (b) False
35. 35.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
36. 36.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too cold (c) they are magnetic (d) they are too shiny
37. 37.⚖️ 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
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
39. 39.⚖️ 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) False (b) True
40. 40.⚙️ Which of these is a lever? (a) a slide (b) a tap handle (c) a see-saw (d) a flagpole

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